diff --git a/src/chart_types/xy_chart/rendering/rendering.areas.test.ts b/src/chart_types/xy_chart/rendering/rendering.areas.test.ts
index a7a053bc8e..bbf1d261a5 100644
--- a/src/chart_types/xy_chart/rendering/rendering.areas.test.ts
+++ b/src/chart_types/xy_chart/rendering/rendering.areas.test.ts
@@ -117,10 +117,7 @@ describe('Rendering points - areas', () => {
             yAccessor: 1,
             splitAccessors: new Map(),
             seriesKeys: [1],
-            key:
-              'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
-            smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-            smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
+            key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           },
           styleOverrides: undefined,
           value: {
@@ -153,10 +150,7 @@ describe('Rendering points - areas', () => {
             yAccessor: 1,
             splitAccessors: new Map(),
             seriesKeys: [1],
-            key:
-              'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
-            smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-            smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
+            key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           },
           styleOverrides: undefined,
           value: {
@@ -248,10 +242,7 @@ describe('Rendering points - areas', () => {
             yAccessor: 1,
             splitAccessors: new Map(),
             seriesKeys: [1],
-            key:
-              'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
-            smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-            smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
+            key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           },
           styleOverrides: undefined,
           value: {
@@ -284,10 +275,7 @@ describe('Rendering points - areas', () => {
             yAccessor: 1,
             splitAccessors: new Map(),
             seriesKeys: [1],
-            key:
-              'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
-            smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-            smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
+            key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           },
           styleOverrides: undefined,
           value: {
@@ -325,10 +313,7 @@ describe('Rendering points - areas', () => {
             yAccessor: 1,
             splitAccessors: new Map(),
             seriesKeys: [1],
-            key:
-              'groupId{group_1}spec{spec_2}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
-            smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-            smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
+            key: 'groupId{group_1}spec{spec_2}yAccessor{1}splitAccessors{}',
           },
           styleOverrides: undefined,
           value: {
@@ -361,10 +346,7 @@ describe('Rendering points - areas', () => {
             yAccessor: 1,
             splitAccessors: new Map(),
             seriesKeys: [1],
-            key:
-              'groupId{group_1}spec{spec_2}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
-            smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-            smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
+            key: 'groupId{group_1}spec{spec_2}yAccessor{1}splitAccessors{}',
           },
           styleOverrides: undefined,
           value: {
diff --git a/src/chart_types/xy_chart/state/chart_state.interactions.test.ts b/src/chart_types/xy_chart/state/chart_state.interactions.test.ts
index 677621cff3..9208029d6c 100644
--- a/src/chart_types/xy_chart/state/chart_state.interactions.test.ts
+++ b/src/chart_types/xy_chart/state/chart_state.interactions.test.ts
@@ -105,58 +105,6 @@ function initStore(spec: BasicSeriesSpec) {
   return store;
 }
 
-// const barStyle = {
-//   rect: {
-//     opacity: 1,
-//   },
-//   rectBorder: {
-//     strokeWidth: 1,
-//     visible: false,
-//   },
-//   displayValue: {
-//     fill: 'black',
-//     fontFamily: '',
-//     fontSize: 2,
-//     offsetX: 0,
-//     offsetY: 0,
-//     padding: 2,
-//   },
-// };
-// const indexedGeom1Red: BarGeometry = {
-//   color: 'red',
-//   x: 0,
-//   y: 0,
-//   width: 50,
-//   height: 100,
-//   value: {
-//     x: 0,
-//     y: 10,
-//     accessor: 'y1',
-//   },
-//   geometryId: {
-//     specId: SPEC_ID,
-//     seriesKey: [],
-//   },
-//   seriesStyle: barStyle,
-// };
-// const indexedGeom2Blue: BarGeometry = {
-//   color: 'blue',
-//   x: 50,
-//   y: 50,
-//   width: 50,
-//   height: 50,
-//   value: {
-//     x: 1,
-//     y: 5,
-//     accessor: 'y1',
-//   },
-//   geometryId: {
-//     specId: SPEC_ID,
-//     seriesKey: [],
-//   },
-//   seriesStyle: barStyle,
-// };
-
 describe('Chart state pointer interactions', () => {
   let store: Store<GlobalChartState>;
   const onElementOutCaller = createOnElementOutCaller();
@@ -421,14 +369,11 @@ function mouseOverTestSuite(scaleType: XScaleType) {
           datum: [0, 10],
         },
         {
-          key:
-            'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
+          key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           seriesKeys: [1],
           specId: 'spec_1',
           splitAccessors: new Map(),
           yAccessor: 1,
-          smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-          smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
         },
       ],
     ]);
@@ -470,15 +415,11 @@ function mouseOverTestSuite(scaleType: XScaleType) {
           datum: [0, 10],
         },
         {
-          key:
-            'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
+          key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           seriesKeys: [1],
           specId: 'spec_1',
           splitAccessors: new Map(),
           yAccessor: 1,
-
-          smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-          smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
         },
       ],
     ]);
@@ -523,14 +464,11 @@ function mouseOverTestSuite(scaleType: XScaleType) {
           datum: [0, 10],
         },
         {
-          key:
-            'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
+          key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           seriesKeys: [1],
           specId: 'spec_1',
           splitAccessors: new Map(),
           yAccessor: 1,
-          smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-          smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
         },
       ],
     ]);
@@ -580,14 +518,11 @@ function mouseOverTestSuite(scaleType: XScaleType) {
           datum: [(spec.data[0] as Array<any>)[0], (spec.data[0] as Array<any>)[1]],
         },
         {
-          key:
-            'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
+          key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           seriesKeys: [1],
           specId: 'spec_1',
           splitAccessors: new Map(),
           yAccessor: 1,
-          smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-          smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
         },
       ],
     ]);
@@ -616,14 +551,11 @@ function mouseOverTestSuite(scaleType: XScaleType) {
           datum: [(spec.data[1] as Array<any>)[0], (spec.data[1] as Array<any>)[1]],
         },
         {
-          key:
-            'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
+          key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           seriesKeys: [1],
           specId: 'spec_1',
           splitAccessors: new Map(),
           yAccessor: 1,
-          smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-          smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
         },
       ],
     ]);
@@ -716,14 +648,11 @@ function mouseOverTestSuite(scaleType: XScaleType) {
           datum: [1, 5],
         },
         {
-          key:
-            'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
+          key: 'groupId{group_1}spec{spec_1}yAccessor{1}splitAccessors{}',
           seriesKeys: [1],
           specId: 'spec_1',
           splitAccessors: new Map(),
           yAccessor: 1,
-          smHorizontalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
-          smVerticalAccessorValue: '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__',
         },
       ],
     ]);
diff --git a/src/chart_types/xy_chart/state/selectors/compute_small_multiple_scales.ts b/src/chart_types/xy_chart/state/selectors/compute_small_multiple_scales.ts
index 82af6d6edd..38521826b7 100644
--- a/src/chart_types/xy_chart/state/selectors/compute_small_multiple_scales.ts
+++ b/src/chart_types/xy_chart/state/selectors/compute_small_multiple_scales.ts
@@ -22,11 +22,7 @@ import createCachedSelector from 're-reselect';
 import { ChartTypes } from '../../..';
 import { ScaleBand } from '../../../../scales';
 import { SpecTypes } from '../../../../specs/constants';
-import {
-  DEFAULT_SINGLE_PANEL_SM_VALUE,
-  DEFAULT_SM_PANEL_PADDING,
-  SmallMultiplesSpec,
-} from '../../../../specs/small_multiples';
+import { DEFAULT_SM_PANEL_PADDING, SmallMultiplesSpec } from '../../../../specs/small_multiples';
 import { GlobalChartState } from '../../../../state/chart_state';
 import { getChartIdSelector } from '../../../../state/selectors/get_chart_id';
 import { getSpecsFromStore } from '../../../../state/utils';
@@ -68,6 +64,6 @@ export const computeSmallMultipleScalesSelector = createCachedSelector(
 
 function getScale(domain: Domain, maxRange: number, padding = DEFAULT_SM_PANEL_PADDING) {
   const singlePanelSmallMultiple = domain.length <= 1;
-  const defaultDomain = domain.length === 0 ? [DEFAULT_SINGLE_PANEL_SM_VALUE] : domain;
+  const defaultDomain = domain.length === 0 ? [undefined] : domain;
   return new ScaleBand(defaultDomain, [0, maxRange], undefined, singlePanelSmallMultiple ? 0 : padding);
 }
diff --git a/src/chart_types/xy_chart/state/selectors/get_cursor_band.ts b/src/chart_types/xy_chart/state/selectors/get_cursor_band.ts
index 1244b4068e..f10bc5cb92 100644
--- a/src/chart_types/xy_chart/state/selectors/get_cursor_band.ts
+++ b/src/chart_types/xy_chart/state/selectors/get_cursor_band.ts
@@ -22,7 +22,6 @@ import createCachedSelector from 're-reselect';
 import { Line, Rect } from '../../../../geoms/types';
 import { Scale } from '../../../../scales';
 import { SettingsSpec, PointerEvent } from '../../../../specs/settings';
-import { DEFAULT_SINGLE_PANEL_SM_VALUE } from '../../../../specs/small_multiples';
 import { GlobalChartState } from '../../../../state/chart_state';
 import { getChartIdSelector } from '../../../../state/selectors/get_chart_id';
 import { getSettingsSpecSelector } from '../../../../state/selectors/get_settings_specs';
@@ -115,8 +114,8 @@ function getCursorBand(
     pointerPosition = {
       x,
       y: 0,
-      verticalPanelValue: DEFAULT_SINGLE_PANEL_SM_VALUE,
-      horizontalPanelValue: DEFAULT_SINGLE_PANEL_SM_VALUE,
+      verticalPanelValue: null,
+      horizontalPanelValue: null,
     };
     xValue = {
       value: externalPointerEvent.value,
diff --git a/src/chart_types/xy_chart/state/selectors/get_tooltip_position.ts b/src/chart_types/xy_chart/state/selectors/get_tooltip_position.ts
index 97b6f6faad..1a6faaaa5b 100644
--- a/src/chart_types/xy_chart/state/selectors/get_tooltip_position.ts
+++ b/src/chart_types/xy_chart/state/selectors/get_tooltip_position.ts
@@ -48,8 +48,8 @@ export const getTooltipAnchorPositionSelector = createCachedSelector(
       return null;
     }
 
-    const topPos = vertical.scale(projectedPointerPosition.verticalPanelValue) || 0;
-    const leftPos = horizontal.scale(projectedPointerPosition.horizontalPanelValue) || 0;
+    const topPos = vertical.scale(projectedPointerPosition.verticalPanelValue) ?? 0;
+    const leftPos = horizontal.scale(projectedPointerPosition.horizontalPanelValue) ?? 0;
 
     const panel = {
       width: horizontal.bandwidth,
diff --git a/src/chart_types/xy_chart/state/utils/__snapshots__/utils.test.ts.snap b/src/chart_types/xy_chart/state/utils/__snapshots__/utils.test.ts.snap
index ad27ac9981..dc64b9430b 100644
--- a/src/chart_types/xy_chart/state/utils/__snapshots__/utils.test.ts.snap
+++ b/src/chart_types/xy_chart/state/utils/__snapshots__/utils.test.ts.snap
@@ -12,8 +12,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -26,8 +26,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -40,8 +40,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -54,8 +54,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -63,13 +63,11 @@ Array [
     ],
     "groupId": "group1",
     "isStacked": false,
-    "key": "groupId{group1}spec{spec1}yAccessor{y}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group1}spec{spec1}yAccessor{y}splitAccessors{}",
     "seriesKeys": Array [
       "y",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
@@ -118,8 +116,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -132,8 +130,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -146,8 +144,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -160,8 +158,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -169,13 +167,11 @@ Array [
     ],
     "groupId": "group2",
     "isStacked": false,
-    "key": "groupId{group2}spec{spec2}yAccessor{y}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group2}spec{spec2}yAccessor{y}splitAccessors{}",
     "seriesKeys": Array [
       "y",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
@@ -280,14 +276,12 @@ Array [
     ],
     "groupId": "group2",
     "isStacked": true,
-    "key": "groupId{group2}spec{spec2}yAccessor{y}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group2}spec{spec2}yAccessor{y}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
@@ -419,14 +413,12 @@ Array [
     ],
     "groupId": "group2",
     "isStacked": true,
-    "key": "groupId{group2}spec{spec2}yAccessor{y}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group2}spec{spec2}yAccessor{y}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
@@ -513,8 +505,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -528,8 +520,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -543,8 +535,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -558,8 +550,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 4,
@@ -567,14 +559,12 @@ Array [
     ],
     "groupId": "group1",
     "isStacked": false,
-    "key": "groupId{group1}spec{spec1}yAccessor{y}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group1}spec{spec1}yAccessor{y}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
@@ -653,8 +643,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 2,
@@ -668,8 +658,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 3,
@@ -683,8 +673,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 4,
@@ -698,8 +688,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 5,
@@ -707,14 +697,12 @@ Array [
     ],
     "groupId": "group1",
     "isStacked": false,
-    "key": "groupId{group1}spec{spec1}yAccessor{y}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group1}spec{spec1}yAccessor{y}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
diff --git a/src/chart_types/xy_chart/state/utils/utils.test.ts b/src/chart_types/xy_chart/state/utils/utils.test.ts
index 1c198e3dfe..062779d2e4 100644
--- a/src/chart_types/xy_chart/state/utils/utils.test.ts
+++ b/src/chart_types/xy_chart/state/utils/utils.test.ts
@@ -231,10 +231,8 @@ describe('Chart State utils', () => {
     const specId1 = 'bar1';
     const specId2 = 'bar2';
     const dg = new SeededDataGenerator();
-    // 4 groups generated
     const data = dg.generateGroupedSeries(50, 4);
-    const targetKey =
-      'groupId{__global__}spec{bar1}yAccessor{y}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}';
+    const targetKey = 'groupId{__global__}spec{bar1}yAccessor{y}splitAccessors{g-b}';
 
     describe('empty series collection and specs', () => {
       it('should return an empty map', () => {
diff --git a/src/chart_types/xy_chart/utils/__snapshots__/series.test.ts.snap b/src/chart_types/xy_chart/utils/__snapshots__/series.test.ts.snap
index 58c42c38b7..9fc2966fd7 100644
--- a/src/chart_types/xy_chart/utils/__snapshots__/series.test.ts.snap
+++ b/src/chart_types/xy_chart/utils/__snapshots__/series.test.ts.snap
@@ -13,8 +13,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -28,8 +28,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -43,14 +43,14 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{1}splitAccessors{2-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{1}splitAccessors{2-a}",
     "seriesKeys": Array [
       "a",
       1,
@@ -72,8 +72,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -87,8 +87,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -102,14 +102,14 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{1}splitAccessors{2-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{1}splitAccessors{2-b}",
     "seriesKeys": Array [
       "b",
       1,
@@ -135,8 +135,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -149,8 +149,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -163,8 +163,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -177,14 +177,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{}",
     "seriesKeys": Array [
       "y",
     ],
@@ -208,8 +208,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -223,8 +223,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -238,8 +238,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -253,14 +253,14 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y",
@@ -282,8 +282,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 2,
@@ -297,8 +297,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 3,
@@ -312,8 +312,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 4,
@@ -327,14 +327,14 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 5,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y",
@@ -362,8 +362,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -378,8 +378,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -394,8 +394,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -410,14 +410,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-a|g2-s}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-a|g2-s}",
     "seriesKeys": Array [
       "a",
       "s",
@@ -442,8 +442,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -458,8 +458,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -474,8 +474,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 2,
@@ -490,14 +490,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-a|g2-p}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-a|g2-p}",
     "seriesKeys": Array [
       "a",
       "p",
@@ -522,8 +522,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -538,8 +538,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -554,8 +554,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -570,14 +570,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-b|g2-s}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-b|g2-s}",
     "seriesKeys": Array [
       "b",
       "s",
@@ -602,8 +602,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -618,8 +618,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -634,8 +634,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 4,
@@ -650,14 +650,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-b|g2-p}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y}splitAccessors{g1-b|g2-p}",
     "seriesKeys": Array [
       "b",
       "p",
@@ -686,8 +686,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -701,8 +701,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -716,8 +716,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -731,14 +731,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{}",
     "seriesKeys": Array [
       "y1",
     ],
@@ -757,8 +757,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -772,8 +772,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 7,
@@ -787,8 +787,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 2,
@@ -802,14 +802,14 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 10,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{}",
     "seriesKeys": Array [
       "y2",
     ],
@@ -834,8 +834,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -850,8 +850,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -866,8 +866,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -882,14 +882,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y1",
@@ -912,8 +912,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 4,
@@ -928,8 +928,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -944,8 +944,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 5,
@@ -960,14 +960,14 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y2",
@@ -990,8 +990,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -1006,8 +1006,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -1022,8 +1022,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -1038,14 +1038,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y1",
@@ -1068,8 +1068,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 6,
@@ -1084,8 +1084,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 5,
@@ -1100,8 +1100,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -1116,14 +1116,14 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y2",
@@ -1152,8 +1152,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -1169,8 +1169,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -1186,8 +1186,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -1203,8 +1203,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -1220,14 +1220,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "direct-cdn",
@@ -1253,8 +1253,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 4,
@@ -1270,8 +1270,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -1287,8 +1287,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 5,
@@ -1304,8 +1304,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -1321,14 +1321,14 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 3,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cdn.google.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cdn.google.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "direct-cdn",
@@ -1354,8 +1354,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -1371,8 +1371,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -1388,8 +1388,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -1405,8 +1405,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -1422,14 +1422,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "indirect-cdn",
@@ -1455,8 +1455,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 4,
@@ -1472,8 +1472,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -1489,8 +1489,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 5,
@@ -1506,8 +1506,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -1523,14 +1523,14 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 3,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cdn.google.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cdn.google.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "indirect-cdn",
@@ -1556,8 +1556,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -1573,8 +1573,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -1590,8 +1590,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -1607,8 +1607,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -1624,14 +1624,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "direct-cdn",
@@ -1657,8 +1657,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 6,
@@ -1674,8 +1674,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 5,
@@ -1691,8 +1691,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -1708,8 +1708,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 4,
@@ -1725,14 +1725,14 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cloudflare.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cloudflare.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "direct-cdn",
@@ -1758,8 +1758,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -1775,8 +1775,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -1792,8 +1792,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -1809,8 +1809,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -1826,14 +1826,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "indirect-cdn",
@@ -1859,8 +1859,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 6,
@@ -1876,8 +1876,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 5,
@@ -1893,8 +1893,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -1910,8 +1910,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 4,
@@ -1927,14 +1927,14 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cloudflare.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cloudflare.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "indirect-cdn",
@@ -22145,7 +22145,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y1",
@@ -22215,7 +22215,7 @@ Array [
         "y1": 8,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y1",
@@ -22285,7 +22285,7 @@ Array [
         "y1": 12,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-c}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-c}",
     "seriesKeys": Array [
       "c",
       "y1",
@@ -22355,7 +22355,7 @@ Array [
         "y1": 16,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-d}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-d}",
     "seriesKeys": Array [
       "d",
       "y1",
@@ -22428,7 +22428,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y1",
@@ -22494,7 +22494,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y1",
@@ -22567,7 +22567,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y1",
@@ -22633,7 +22633,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y1",
@@ -22709,7 +22709,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y1",
@@ -22783,7 +22783,7 @@ Array [
         "y1": 8,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y1",
@@ -22859,7 +22859,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y1",
@@ -22933,7 +22933,7 @@ Array [
         "y1": 8,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y1",
@@ -23006,7 +23006,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-a}",
     "seriesKeys": Array [
       "a",
       "y1",
@@ -23072,7 +23072,7 @@ Array [
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g-b}",
     "seriesKeys": Array [
       "b",
       "y1",
@@ -23101,8 +23101,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 1,
@@ -23118,8 +23118,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 1,
@@ -23135,8 +23135,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 2,
@@ -23152,8 +23152,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 2,
@@ -23169,8 +23169,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 10,
@@ -23186,8 +23186,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 10,
@@ -23203,8 +23203,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 7,
@@ -23220,8 +23220,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 7,
@@ -23237,8 +23237,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 7,
@@ -23254,14 +23254,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com}",
     "seriesKeys": Array [
       "cdn.google.com",
       "y1",
@@ -23285,8 +23285,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 3,
@@ -23302,8 +23302,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 3,
@@ -23319,8 +23319,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 2,
@@ -23336,8 +23336,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 2,
@@ -23353,8 +23353,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 3,
@@ -23370,8 +23370,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 3,
@@ -23387,8 +23387,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 6,
@@ -23404,8 +23404,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 6,
@@ -23421,8 +23421,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 6,
@@ -23438,14 +23438,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": "_all",
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com}",
     "seriesKeys": Array [
       "cloudflare.com",
       "y1",
@@ -23474,8 +23474,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -23491,8 +23491,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -23508,8 +23508,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -23525,8 +23525,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -23542,8 +23542,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -23559,8 +23559,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -23576,8 +23576,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -23593,8 +23593,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -23610,8 +23610,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
@@ -23627,14 +23627,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cdn.google.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cdn.google.com}",
     "seriesKeys": Array [
       "cdn.google.com",
       "y1",
@@ -23658,8 +23658,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -23675,8 +23675,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -23692,8 +23692,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -23709,8 +23709,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -23726,8 +23726,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -23743,8 +23743,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -23760,8 +23760,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -23777,8 +23777,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -23794,8 +23794,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
@@ -23811,14 +23811,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cloudflare.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cloudflare.com}",
     "seriesKeys": Array [
       "cloudflare.com",
       "y1",
@@ -23847,8 +23847,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -23864,8 +23864,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -23881,8 +23881,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -23898,8 +23898,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -23915,8 +23915,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -23932,8 +23932,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -23949,8 +23949,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -23966,8 +23966,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -23983,8 +23983,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
@@ -24000,14 +24000,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{custom name-cdn.google.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{custom name-cdn.google.com}",
     "seriesKeys": Array [
       "cdn.google.com",
       "y1",
@@ -24031,8 +24031,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -24048,8 +24048,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -24065,8 +24065,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -24082,8 +24082,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -24099,8 +24099,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -24116,8 +24116,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -24133,8 +24133,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -24150,8 +24150,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -24167,8 +24167,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
@@ -24184,14 +24184,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{custom name-cloudflare.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{custom name-cloudflare.com}",
     "seriesKeys": Array [
       "cloudflare.com",
       "y1",
@@ -24220,8 +24220,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -24237,8 +24237,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -24254,8 +24254,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -24271,8 +24271,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -24288,8 +24288,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -24305,8 +24305,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -24322,8 +24322,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -24339,8 +24339,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -24356,8 +24356,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
@@ -24373,14 +24373,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cdn.google.com}",
     "seriesKeys": Array [
       "cdn.google.com",
       "y1",
@@ -24404,8 +24404,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 4,
@@ -24421,8 +24421,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 4,
@@ -24438,8 +24438,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -24455,8 +24455,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -24472,8 +24472,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 5,
@@ -24489,8 +24489,8 @@ Array [
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         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 5,
@@ -24506,8 +24506,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -24523,8 +24523,8 @@ Array [
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         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -24540,8 +24540,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 3,
@@ -24557,14 +24557,14 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 3,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cdn.google.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cdn.google.com}",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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+        "smV": undefined,
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         "y1": 3,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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+        "smV": undefined,
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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+        "smV": undefined,
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -24673,8 +24673,8 @@ Array [
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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@@ -24724,8 +24724,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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@@ -24741,14 +24741,14 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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+        "smV": undefined,
         "x": 6,
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-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{g1-cloudflare.com}",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
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@@ -24925,14 +24925,14 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cloudflare.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y2}splitAccessors{g1-cloudflare.com}",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25214,8 +25214,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25244,8 +25244,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25274,8 +25274,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25304,8 +25304,8 @@ Array [
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25319,8 +25319,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551438720000,
         "y0": 17.40625,
         "y1": 25.40625,
@@ -25334,8 +25334,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551438750000,
         "y0": 13.921875,
         "y1": 25.921875,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551438840000,
         "y0": 15.953125,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551438900000,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551438930000,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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         "y0": 0.26171875,
         "y1": 12.26171875,
@@ -25529,8 +25529,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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@@ -25544,8 +25544,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551439200000,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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@@ -25604,8 +25604,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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+        "smV": undefined,
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@@ -25634,8 +25634,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25649,8 +25649,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
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@@ -25664,8 +25664,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25724,8 +25724,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25739,8 +25739,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25784,8 +25784,8 @@ Array [
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25799,8 +25799,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25814,8 +25814,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25829,8 +25829,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25874,8 +25874,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25889,8 +25889,8 @@ Array [
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-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25904,8 +25904,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25919,8 +25919,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25934,8 +25934,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25949,8 +25949,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25964,8 +25964,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25979,8 +25979,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -25994,8 +25994,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -26009,8 +26009,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -26024,8 +26024,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -26039,8 +26039,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -26054,8 +26054,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
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@@ -26069,8 +26069,8 @@ Array [
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-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440220000,
         "y0": 7.8984375,
         "y1": 19.8984375,
@@ -26084,8 +26084,8 @@ Array [
         "initialY0": 6.875,
         "initialY1": 14.875,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440250000,
         "y0": 6.875,
         "y1": 14.875,
@@ -26099,8 +26099,8 @@ Array [
         "initialY0": 4.4140625,
         "initialY1": 20.4140625,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440280000,
         "y0": 4.4140625,
         "y1": 20.4140625,
@@ -26114,8 +26114,8 @@ Array [
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         "initialY1": 20.78125,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440310000,
         "y0": 8.78125,
         "y1": 20.78125,
@@ -26129,8 +26129,8 @@ Array [
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         "initialY1": 42.28125,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440340000,
         "y0": 26.28125,
         "y1": 42.28125,
@@ -26144,8 +26144,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440370000,
         "y0": 25.84375,
         "y1": 33.84375,
@@ -26159,8 +26159,8 @@ Array [
         "initialY0": 14.40625,
         "initialY1": 26.40625,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440400000,
         "y0": 14.40625,
         "y1": 26.40625,
@@ -26174,8 +26174,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440430000,
         "y0": 12.046875,
         "y1": 24.046875,
@@ -26189,8 +26189,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440460000,
         "y0": 8.6328125,
         "y1": 20.6328125,
@@ -26204,8 +26204,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440490000,
         "y0": 4.8125,
         "y1": 16.8125,
@@ -26219,8 +26219,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440520000,
         "y0": -1.06640625,
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@@ -26234,8 +26234,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440550000,
         "y0": 2.12890625,
         "y1": 14.12890625,
@@ -26249,8 +26249,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440580000,
         "y0": 1.69921875,
         "y1": 13.69921875,
@@ -26264,8 +26264,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440610000,
         "y0": -2.51171875,
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@@ -26279,8 +26279,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440640000,
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@@ -26294,8 +26294,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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         "y0": 6.484375,
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@@ -26309,8 +26309,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440700000,
         "y0": 4.890625,
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@@ -26324,8 +26324,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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         "y0": 7.578125,
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@@ -26339,8 +26339,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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@@ -26354,8 +26354,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440790000,
         "y0": 1.921875,
         "y1": 13.921875,
@@ -26369,8 +26369,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440820000,
         "y0": 2.5078125,
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@@ -26384,8 +26384,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440850000,
         "y0": 3.375,
         "y1": 15.375,
@@ -26399,8 +26399,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440880000,
         "y0": 7.890625,
         "y1": 19.890625,
@@ -26414,8 +26414,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440910000,
         "y0": 6.1953125,
         "y1": 22.1953125,
@@ -26429,8 +26429,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551440940000,
         "y0": 7.625,
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@@ -26444,8 +26444,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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@@ -26459,8 +26459,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441000000,
         "y0": 2.1640625,
         "y1": 14.1640625,
@@ -26474,8 +26474,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441030000,
         "y0": 5.296875,
         "y1": 13.296875,
@@ -26489,8 +26489,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441060000,
         "y0": 3.5546875,
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@@ -26504,8 +26504,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441090000,
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@@ -26519,8 +26519,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441120000,
         "y0": 1.8671875,
         "y1": 9.8671875,
@@ -26534,8 +26534,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441150000,
         "y0": -1.171875,
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@@ -26549,8 +26549,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441180000,
         "y0": 2.578125,
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@@ -26564,8 +26564,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441210000,
         "y0": 12.140625,
         "y1": 20.140625,
@@ -26579,8 +26579,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
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@@ -26594,8 +26594,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441270000,
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@@ -26609,8 +26609,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441300000,
         "y0": 3.9140625,
         "y1": 15.9140625,
@@ -26624,8 +26624,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441330000,
         "y0": 6.0625,
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@@ -26639,8 +26639,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441360000,
         "y0": 3.66015625,
         "y1": 11.66015625,
@@ -26654,8 +26654,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441390000,
         "y0": 1.0078125,
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@@ -26669,8 +26669,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441420000,
         "y0": 4.78125,
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@@ -26684,8 +26684,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441450000,
         "y0": 0.0390625,
         "y1": 16.0390625,
@@ -26699,8 +26699,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441480000,
         "y0": 17.515625,
         "y1": 29.515625,
@@ -26714,8 +26714,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441510000,
         "y0": 14.640625,
         "y1": 22.640625,
@@ -26729,8 +26729,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441540000,
         "y0": 5.1953125,
         "y1": 17.1953125,
@@ -26744,14 +26744,14 @@ Array [
         "initialY0": 6.1953125,
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1551441570000,
         "y0": 6.1953125,
         "y1": 14.1953125,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{(index:0)}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{(index:0)}splitAccessors{}",
     "seriesKeys": Array [
       "(index:0)",
     ],
@@ -26777,8 +26777,8 @@ Array [
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -26794,8 +26794,8 @@ Array [
         "initialY0": null,
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -26811,8 +26811,8 @@ Array [
         "initialY0": null,
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         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -26828,8 +26828,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -26845,8 +26845,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -26862,8 +26862,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -26879,8 +26879,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -26896,8 +26896,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -26913,8 +26913,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
@@ -26930,14 +26930,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{(index:0)}splitAccessors{g1-cdn.google.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{(index:0)}splitAccessors{g1-cdn.google.com}",
     "seriesKeys": Array [
       "cdn.google.com",
       "(index:0)",
@@ -26961,8 +26961,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -26978,8 +26978,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -26995,8 +26995,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -27012,8 +27012,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -27029,8 +27029,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -27046,8 +27046,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -27063,8 +27063,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -27080,8 +27080,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -27097,8 +27097,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
@@ -27114,14 +27114,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{(index:0)}splitAccessors{g1-cloudflare.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{(index:0)}splitAccessors{g1-cloudflare.com}",
     "seriesKeys": Array [
       "cloudflare.com",
       "(index:0)",
@@ -27150,8 +27150,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -27167,8 +27167,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -27184,8 +27184,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -27201,8 +27201,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -27218,8 +27218,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -27235,8 +27235,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -27252,8 +27252,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -27269,8 +27269,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 7,
@@ -27286,8 +27286,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
@@ -27303,14 +27303,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{custom name}splitAccessors{g1-cdn.google.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{custom name}splitAccessors{g1-cdn.google.com}",
     "seriesKeys": Array [
       "cdn.google.com",
       "custom name",
@@ -27334,8 +27334,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -27351,8 +27351,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -27368,8 +27368,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -27385,8 +27385,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -27402,8 +27402,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -27419,8 +27419,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 3,
@@ -27436,8 +27436,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -27453,8 +27453,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -27470,8 +27470,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
@@ -27487,14 +27487,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{custom name}splitAccessors{g1-cloudflare.com}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{custom name}splitAccessors{g1-cloudflare.com}",
     "seriesKeys": Array [
       "cloudflare.com",
       "custom name",
@@ -27523,8 +27523,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -27540,8 +27540,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 2,
@@ -27557,8 +27557,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 10,
         "y0": null,
         "y1": 10,
@@ -27574,8 +27574,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 7,
@@ -27591,14 +27591,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cdn.google.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cdn.google.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "direct-cdn",
@@ -27624,8 +27624,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 4,
@@ -27641,8 +27641,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -27658,8 +27658,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 10,
         "y0": null,
         "y1": 5,
@@ -27675,8 +27675,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 3,
@@ -27692,14 +27692,14 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 3,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cdn.google.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cdn.google.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "direct-cdn",
@@ -27725,8 +27725,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 1,
@@ -27742,8 +27742,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 2,
@@ -27759,8 +27759,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 10,
         "y0": null,
         "y1": 10,
@@ -27776,8 +27776,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 7,
@@ -27793,14 +27793,14 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 7,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cdn.google.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cdn.google.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "indirect-cdn",
@@ -27826,8 +27826,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 4,
@@ -27843,8 +27843,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -27860,8 +27860,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 10,
         "y0": null,
         "y1": 5,
@@ -27877,8 +27877,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 3,
@@ -27894,14 +27894,14 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 7,
         "y0": null,
         "y1": 3,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cdn.google.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cdn.google.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cdn.google.com",
       "indirect-cdn",
@@ -27927,8 +27927,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -27944,8 +27944,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 2,
@@ -27961,8 +27961,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -27978,8 +27978,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
@@ -27995,14 +27995,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cloudflare.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cloudflare.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "direct-cdn",
@@ -28028,8 +28028,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -28045,8 +28045,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 5,
@@ -28062,8 +28062,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 1,
@@ -28079,8 +28079,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 4,
@@ -28096,14 +28096,14 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cloudflare.com|g2-direct-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cloudflare.com|g2-direct-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "direct-cdn",
@@ -28129,8 +28129,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -28146,8 +28146,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 2,
@@ -28163,8 +28163,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 3,
@@ -28180,8 +28180,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
@@ -28197,14 +28197,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cloudflare.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{y1}splitAccessors{(index:0)-cloudflare.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "indirect-cdn",
@@ -28230,8 +28230,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -28247,8 +28247,8 @@ Array [
         "initialY0": null,
         "initialY1": 5,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 5,
@@ -28264,8 +28264,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 1,
@@ -28281,8 +28281,8 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 4,
@@ -28298,14 +28298,14 @@ Array [
         "initialY0": null,
         "initialY1": 4,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 6,
         "y0": null,
         "y1": 4,
       },
     ],
-    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cloudflare.com|g2-indirect-cdn}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{__global__}spec{spec1}yAccessor{(index:1)}splitAccessors{(index:0)-cloudflare.com|g2-indirect-cdn}",
     "seriesKeys": Array [
       "cloudflare.com",
       "indirect-cdn",
@@ -28382,7 +28382,7 @@ Array [
         "y1": 6,
       },
     ],
-    "key": "groupId{group2}spec{spec2}yAccessor{y1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group2}spec{spec2}yAccessor{y1}splitAccessors{}",
     "seriesKeys": Array [
       "y1",
     ],
@@ -28449,7 +28449,7 @@ Array [
         "y1": 16,
       },
     ],
-    "key": "groupId{group2}spec{spec2}yAccessor{y2}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group2}spec{spec2}yAccessor{y2}splitAccessors{}",
     "seriesKeys": Array [
       "y2",
     ],
@@ -28467,8 +28467,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -28481,8 +28481,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -28495,8 +28495,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -28509,14 +28509,14 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
       },
     ],
-    "key": "groupId{group}spec{spec1}yAccessor{y}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group}spec{spec1}yAccessor{y}splitAccessors{}",
     "seriesKeys": Array [
       "y",
     ],
@@ -28539,8 +28539,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -28553,8 +28553,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -28567,8 +28567,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 10,
@@ -28581,8 +28581,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -28590,13 +28590,11 @@ Array [
     ],
     "groupId": "group",
     "isStacked": false,
-    "key": "groupId{group}spec{spec1}yAccessor{y}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group}spec{spec1}yAccessor{y}splitAccessors{}",
     "seriesKeys": Array [
       "y",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
@@ -28650,8 +28648,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 1,
@@ -28665,8 +28663,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 2,
@@ -28680,8 +28678,8 @@ Array [
         "initialY0": null,
         "initialY1": 1,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 1,
@@ -28695,8 +28693,8 @@ Array [
         "initialY0": null,
         "initialY1": 6,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 6,
@@ -28704,13 +28702,11 @@ Array [
     ],
     "groupId": "group2",
     "isStacked": true,
-    "key": "groupId{group2}spec{spec2}yAccessor{y1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group2}spec{spec2}yAccessor{y1}splitAccessors{}",
     "seriesKeys": Array [
       "y1",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
@@ -28767,8 +28763,8 @@ Array [
         "initialY0": null,
         "initialY1": 3,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 0,
         "y0": null,
         "y1": 3,
@@ -28782,8 +28778,8 @@ Array [
         "initialY0": null,
         "initialY1": 7,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 1,
         "y0": null,
         "y1": 7,
@@ -28797,8 +28793,8 @@ Array [
         "initialY0": null,
         "initialY1": 2,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 2,
         "y0": null,
         "y1": 2,
@@ -28812,8 +28808,8 @@ Array [
         "initialY0": null,
         "initialY1": 10,
         "mark": null,
-        "smH": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-        "smV": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
+        "smH": undefined,
+        "smV": undefined,
         "x": 3,
         "y0": null,
         "y1": 10,
@@ -28821,13 +28817,11 @@ Array [
     ],
     "groupId": "group2",
     "isStacked": true,
-    "key": "groupId{group2}spec{spec2}yAccessor{y2}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}",
+    "key": "groupId{group2}spec{spec2}yAccessor{y2}splitAccessors{}",
     "seriesKeys": Array [
       "y2",
     ],
     "seriesType": "line",
-    "smHorizontalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
-    "smVerticalAccessorValue": "__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__",
     "spec": Object {
       "chartType": "xy_axis",
       "data": Array [
diff --git a/src/chart_types/xy_chart/utils/indexed_geometry_map.ts b/src/chart_types/xy_chart/utils/indexed_geometry_map.ts
index 6fe54d6bb4..a4562c7445 100644
--- a/src/chart_types/xy_chart/utils/indexed_geometry_map.ts
+++ b/src/chart_types/xy_chart/utils/indexed_geometry_map.ts
@@ -19,6 +19,7 @@
 
 import { $Values } from 'utility-types';
 
+import { isNil } from '../../../utils/commons';
 import { Bounds } from '../../../utils/d3-delaunay';
 import { IndexedGeometry, isPointGeometry } from '../../../utils/geometry';
 import { Point } from '../../../utils/point';
@@ -77,14 +78,11 @@ export class IndexedGeometryMap {
     }
 
     const spatialValues = point === undefined ? [] : this.spatialMap.find(point);
-
-    const values = [...this.linearMap.find(x), ...spatialValues];
-    if (!smHorizontalValue || !smVerticalValue) {
-      return values;
-    }
-    return values.filter(({ seriesIdentifier: { smHorizontalAccessorValue, smVerticalAccessorValue } }) => {
-      return smVerticalAccessorValue === smVerticalValue && smHorizontalAccessorValue === smHorizontalValue;
-    });
+    return [...this.linearMap.find(x), ...spatialValues].filter(
+      ({ seriesIdentifier: { smHorizontalAccessorValue, smVerticalAccessorValue } }) =>
+        (isNil(smVerticalValue) || smVerticalAccessorValue === smVerticalValue) &&
+        (isNil(smHorizontalValue) || smHorizontalAccessorValue === smHorizontalValue),
+    );
   }
 
   getMergeData() {
diff --git a/src/chart_types/xy_chart/utils/series.test.ts b/src/chart_types/xy_chart/utils/series.test.ts
index d92facf7d0..2e6e12a2f5 100644
--- a/src/chart_types/xy_chart/utils/series.test.ts
+++ b/src/chart_types/xy_chart/utils/series.test.ts
@@ -604,8 +604,7 @@ describe('Series', () => {
         yAccessor: yAccessors[0],
         splitAccessors: new Map(),
         seriesKeys: [],
-        key:
-          'groupId{group}spec{splitSpec}yAccessor{y1}splitAccessors{}smV{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}smH{__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__}',
+        key: 'groupId{group}spec{splitSpec}yAccessor{y1}splitAccessors{}',
       },
     ];
     const subsetSplit = getDataSeriesFromSpecs([splitSpec], deselectedDataSeries);
diff --git a/src/chart_types/xy_chart/utils/series.ts b/src/chart_types/xy_chart/utils/series.ts
index 52cf403241..1c25bae439 100644
--- a/src/chart_types/xy_chart/utils/series.ts
+++ b/src/chart_types/xy_chart/utils/series.ts
@@ -19,7 +19,7 @@
 
 import { SeriesIdentifier, SeriesKey } from '../../../commons/series_id';
 import { ScaleType } from '../../../scales/constants';
-import { GroupBySpec, BinAgg, Direction, XScaleType, DEFAULT_SINGLE_PANEL_SM_VALUE } from '../../../specs';
+import { GroupBySpec, BinAgg, Direction, XScaleType } from '../../../specs';
 import { OrderBy } from '../../../specs/settings';
 import { ColorOverrides } from '../../../state/chart_state';
 import { Accessor, AccessorFn, getAccessorValue } from '../../../utils/accessor';
@@ -182,14 +182,12 @@ export function splitSeriesDataByAccessors(
     let sum = xValueSums.get(x) ?? 0;
 
     // extract small multiples aggregation values
-    const smH = smallMultiples?.horizontal?.by
-      ? smallMultiples.horizontal?.by(spec, datum)
-      : DEFAULT_SINGLE_PANEL_SM_VALUE;
+    const smH = smallMultiples?.horizontal?.by?.(spec, datum);
     if (!isNil(smH)) {
       smHValues.add(smH);
     }
 
-    const smV = smallMultiples?.vertical?.by ? smallMultiples.vertical.by(spec, datum) : DEFAULT_SINGLE_PANEL_SM_VALUE;
+    const smV = smallMultiples?.vertical?.by?.(spec, datum);
     if (!isNil(smV)) {
       smVValues.add(smV);
     }
@@ -211,8 +209,8 @@ export function splitSeriesDataByAccessors(
         seriesKeys,
         yAccessor: accessorStr,
         splitAccessors,
-        smVerticalAccessorValue: smV,
-        smHorizontalAccessorValue: smH,
+        ...(smV && { smVerticalAccessorValue: smV }),
+        ...(smH && { smHorizontalAccessorValue: smH }),
       };
       const seriesKey = getSeriesKey(seriesIdentifier, groupId);
       sum += cleanedDatum.y1 ?? 0;
diff --git a/src/mocks/series/series_identifiers.ts b/src/mocks/series/series_identifiers.ts
index 819b5e6338..a34ff94a9b 100644
--- a/src/mocks/series/series_identifiers.ts
+++ b/src/mocks/series/series_identifiers.ts
@@ -22,7 +22,7 @@ import {
   getDataSeriesFromSpecs,
   XYChartSeriesIdentifier,
 } from '../../chart_types/xy_chart/utils/series';
-import { BasicSeriesSpec, DEFAULT_SINGLE_PANEL_SM_VALUE } from '../../specs';
+import { BasicSeriesSpec } from '../../specs';
 import { mergePartial } from '../../utils/commons';
 
 type SeriesCollection = Map<string, SeriesCollectionValue>;
@@ -47,9 +47,7 @@ export class MockSeriesIdentifier {
     yAccessor: 'y',
     seriesKeys: ['a'],
     splitAccessors: new Map().set('g', 'a'),
-    key: `spec{bars}yAccessor{y}splitAccessors{g-a}smV${DEFAULT_SINGLE_PANEL_SM_VALUE}smH${DEFAULT_SINGLE_PANEL_SM_VALUE}`,
-    smHorizontalAccessorValue: DEFAULT_SINGLE_PANEL_SM_VALUE,
-    smVerticalAccessorValue: DEFAULT_SINGLE_PANEL_SM_VALUE,
+    key: 'spec{bars}yAccessor{y}splitAccessors{g-a}',
   };
 
   static default(partial?: Partial<XYChartSeriesIdentifier>) {
diff --git a/src/specs/small_multiples.ts b/src/specs/small_multiples.ts
index b3ef93770a..e021f2a937 100644
--- a/src/specs/small_multiples.ts
+++ b/src/specs/small_multiples.ts
@@ -23,9 +23,6 @@ import { ChartTypes } from '../chart_types';
 import { getConnect, specComponentFactory } from '../state/spec_factory';
 import { SpecTypes } from './constants';
 
-/** @internal */
-export const DEFAULT_SINGLE_PANEL_SM_VALUE = '__ECH_DEFAULT_SINGLE_PANEL_SM_VALUE__';
-
 /** @internal */
 export const DEFAULT_SM_PANEL_PADDING: [number, number] = [0, 0.1];
 
diff --git a/stories/small_multiples/2_vertical_areas.tsx b/stories/small_multiples/2_vertical_areas.tsx
index a715416f08..9a229261ee 100644
--- a/stories/small_multiples/2_vertical_areas.tsx
+++ b/stories/small_multiples/2_vertical_areas.tsx
@@ -16,6 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+import { action } from '@storybook/addon-actions';
 import { boolean } from '@storybook/addon-knobs';
 import { DateTime } from 'luxon';
 import React from 'react';
@@ -47,9 +48,10 @@ const data = dg.generateGroupedSeries(numOfDays, 6, 'metric ').map((d) => {
 
 export const Example = () => {
   const showLegend = boolean('Show Legend', false);
+  const onElementClick = action('onElementClick');
   return (
     <Chart className="story-chart">
-      <Settings showLegend={showLegend} />
+      <Settings onElementClick={onElementClick} showLegend={showLegend} />
       <Axis
         id="time"
         title="timestamp"
diff --git a/stories/small_multiples/3_grid_lines.tsx b/stories/small_multiples/3_grid_lines.tsx
index 09c2bfd77b..91a23d7601 100644
--- a/stories/small_multiples/3_grid_lines.tsx
+++ b/stories/small_multiples/3_grid_lines.tsx
@@ -16,6 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+import { action } from '@storybook/addon-actions';
 import { boolean } from '@storybook/addon-knobs';
 import { DateTime } from 'luxon';
 import React from 'react';
@@ -51,9 +52,12 @@ const data = dg.generateGroupedSeries(numOfDays, 16).map((d) => {
 
 export const Example = () => {
   const showLegend = boolean('Show Legend', false);
+  const onElementClick = action('onElementClick');
+
   return (
     <Chart className="story-chart">
       <Settings
+        onElementClick={onElementClick}
         showLegend={showLegend}
         theme={{
           lineSeriesStyle: {
diff --git a/stories/small_multiples/4_horizontal_bars.tsx b/stories/small_multiples/4_horizontal_bars.tsx
index 40d297e40f..6230bcd1f1 100644
--- a/stories/small_multiples/4_horizontal_bars.tsx
+++ b/stories/small_multiples/4_horizontal_bars.tsx
@@ -16,6 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+import { action } from '@storybook/addon-actions';
 import { boolean } from '@storybook/addon-knobs';
 import { DateTime } from 'luxon';
 import React from 'react';
@@ -69,10 +70,11 @@ export const Example = () => {
     </span>
   );
   const showLegend = boolean('Show Legend', false);
+  const onElementClick = action('onElementClick');
 
   return (
     <Chart className="story-chart">
-      <Settings rotation={90} showLegend={showLegend} />
+      <Settings onElementClick={onElementClick} rotation={90} showLegend={showLegend} />
       <Axis id="time" title="metric" position={Position.Bottom} gridLine={{ visible: false }} />
       <Axis id="y" title="Day of week" position={Position.Left} gridLine={{ visible: false }} />