diff --git a/docs/grid-functionalities/grouping-aggregators.md b/docs/grid-functionalities/grouping-aggregators.md
index ef73f6266..697317af5 100644
--- a/docs/grid-functionalities/grouping-aggregators.md
+++ b/docs/grid-functionalities/grouping-aggregators.md
@@ -2,6 +2,7 @@
 - [Demo](#demo)
 - [Description](#description)
 - [Setup](#setup)
+- [Draggable Dropzone Location](#draggable-dropzone-location)
 - [Aggregators](#aggregators)
 - [SortComparers](https://github.com/ghiscoding/slickgrid-universal/blob/master/packages/common/src/sortComparers/sortComparers.index.ts)
 - [GroupTotalsFormatter](#group-totals-formatter)
@@ -62,6 +63,43 @@ export class Example {
 }
 ```
 
+### Draggable Dropzone Location
+
+The Draggable Grouping can be located in either the Top-Header or the Pre-Header as described below.
+
+#### Pre-Heaader
+Draggable Grouping can be located in either the Pre-Header of the Top-Header, however when it is located in the Pre-Header then the Header Grouping will not be available (because both of them would conflict with each other). Note that prior to the version 8.1 of Aurelia-Slickgrid, the Pre-Header was the default and only available option.
+
+```ts
+this.gridOptions = {
+  createPreHeaderPanel: true,
+  showPreHeaderPanel: true,
+  preHeaderPanelHeight: 26,
+  draggableGrouping: {
+    // ... any draggable plugin option
+  },
+}
+```
+
+#### Top-Heaader
+##### requires v8.1 and higher
+This is the preferred section since the Top-Header is on top of all headers (including pre-header) and it will always be the full grid width. Using the Top-Header also frees up the Pre-Header section for the potential use of Header Grouping.
+
+When using Draggable Grouping and Header Grouping together, you need to enable both top-header and pre-header.
+```ts
+this.gridOptions = {
+    // we'll use top-header for the Draggable Grouping
+  createTopHeaderPanel: true,
+  showTopHeaderPanel: true,
+  topHeaderPanelHeight: 35,
+
+  // pre-header will include our Header Grouping (i.e. "Common Factor")
+  createPreHeaderPanel: true,
+  showPreHeaderPanel: true,
+  preHeaderPanelHeight: 26,
+}
+```
+
 ### Aggregators
 The `Aggregators` is basically the accumulator, the logic that will do the sum (or any other aggregate we defined). We simply need to instantiate the `Aggregator` by passing the column definition `field` that will be used to accumulate. For example, if we have a column definition of Cost and we want to calculate it's sum, we can call the `Aggregator` as follow
 ```ts
diff --git a/packages/aurelia-slickgrid/src/custom-elements/aurelia-slickgrid.ts b/packages/aurelia-slickgrid/src/custom-elements/aurelia-slickgrid.ts
index 1a717ec03..bc1a29869 100644
--- a/packages/aurelia-slickgrid/src/custom-elements/aurelia-slickgrid.ts
+++ b/packages/aurelia-slickgrid/src/custom-elements/aurelia-slickgrid.ts
@@ -673,7 +673,7 @@ export class AureliaSlickgridCustomElement {
 
         if (gridOptions.enableTranslate) {
           this.extensionService.translateAllExtensions(args.newLocale);
-          if (gridOptions.createPreHeaderPanel && !gridOptions.enableDraggableGrouping) {
+          if ((gridOptions.createPreHeaderPanel && gridOptions.createTopHeaderPanel) || (gridOptions.createPreHeaderPanel && !gridOptions.enableDraggableGrouping)) {
             this.groupingService.translateGroupingAndColSpan();
           }
         }
@@ -1358,7 +1358,10 @@ export class AureliaSlickgridCustomElement {
     }
 
     // when using Grouping/DraggableGrouping/Colspan register its Service
-    if (this.gridOptions.createPreHeaderPanel && !this.gridOptions.enableDraggableGrouping && !this._registeredResources.some(r => r instanceof GroupingAndColspanService)) {
+    if (
+      ((this.gridOptions.createPreHeaderPanel && this.gridOptions.createTopHeaderPanel) || (this.gridOptions.createPreHeaderPanel && !this.gridOptions.enableDraggableGrouping))
+      && !this._registeredResources.some(r => r instanceof GroupingAndColspanService)
+    ) {
       this._registeredResources.push(this.groupingService);
     }
 
diff --git a/packages/demo/src/examples/slickgrid/example18.ts b/packages/demo/src/examples/slickgrid/example18.ts
index a814dcaa2..0443b6930 100644
--- a/packages/demo/src/examples/slickgrid/example18.ts
+++ b/packages/demo/src/examples/slickgrid/example18.ts
@@ -71,7 +71,7 @@ export class Example18 {
   defineGrid() {
     this.columnDefinitions = [
       {
-        id: 'title', name: 'Title', field: 'title',
+        id: 'title', name: 'Title', field: 'title', columnGroup: 'Common Factor',
         width: 70, minWidth: 50,
         cssClass: 'cell-title',
         filterable: true,
@@ -87,7 +87,7 @@ export class Example18 {
         }
       },
       {
-        id: 'duration', name: 'Duration', field: 'duration',
+        id: 'duration', name: 'Duration', field: 'duration', columnGroup: 'Common Factor',
         width: 70,
         sortable: true,
         filterable: true,
@@ -108,27 +108,8 @@ export class Example18 {
         }
       },
       {
-        id: 'percentComplete', name: '% Complete', field: 'percentComplete',
-        minWidth: 70, width: 90,
-        formatter: Formatters.percentCompleteBar,
-        type: FieldType.number,
-        filterable: true,
-        filter: { model: Filters.compoundSlider },
-        sortable: true,
-        groupTotalsFormatter: GroupTotalFormatters.avgTotalsPercentage,
-        grouping: {
-          getter: 'percentComplete',
-          formatter: (g) => `% Complete: ${g.value}  <span class="text-primary">(${g.count} items)</span>`,
-          aggregators: [
-            new Aggregators.Sum('cost')
-          ],
-          aggregateCollapsed: false,
-          collapsed: false
-        },
-        params: { groupFormatterPrefix: '<i>Avg</i>: ' }
-      },
-      {
-        id: 'start', name: 'Start', field: 'start', minWidth: 60,
+        id: 'start', name: 'Start', field: 'start', columnGroup: 'Period',
+        minWidth: 60,
         sortable: true,
         filterable: true,
         filter: { model: Filters.compoundDate },
@@ -147,7 +128,7 @@ export class Example18 {
         }
       },
       {
-        id: 'finish', name: 'Finish', field: 'finish',
+        id: 'finish', name: 'Finish', field: 'finish', columnGroup: 'Period',
         minWidth: 60,
         sortable: true,
         filterable: true,
@@ -167,7 +148,7 @@ export class Example18 {
         }
       },
       {
-        id: 'cost', name: 'Cost', field: 'cost',
+        id: 'cost', name: 'Cost', field: 'cost', columnGroup: 'Analysis',
         width: 90,
         sortable: true,
         filterable: true,
@@ -187,7 +168,27 @@ export class Example18 {
         }
       },
       {
-        id: 'effortDriven', name: 'Effort-Driven', field: 'effortDriven',
+        id: 'percentComplete', name: '% Complete', field: 'percentComplete', columnGroup: 'Analysis',
+        minWidth: 70, width: 90,
+        formatter: Formatters.percentCompleteBar,
+        type: FieldType.number,
+        filterable: true,
+        filter: { model: Filters.compoundSlider },
+        sortable: true,
+        groupTotalsFormatter: GroupTotalFormatters.avgTotalsPercentage,
+        grouping: {
+          getter: 'percentComplete',
+          formatter: (g) => `% Complete: ${g.value}  <span class="text-primary">(${g.count} items)</span>`,
+          aggregators: [
+            new Aggregators.Sum('cost')
+          ],
+          aggregateCollapsed: false,
+          collapsed: false
+        },
+        params: { groupFormatterPrefix: '<i>Avg</i>: ' }
+      },
+      {
+        id: 'effortDriven', name: 'Effort-Driven', field: 'effortDriven', columnGroup: 'Analysis',
         width: 80, minWidth: 20, maxWidth: 100,
         cssClass: 'cell-effort-driven',
         sortable: true,
@@ -214,9 +215,18 @@ export class Example18 {
         rightPadding: 10
       },
       enableDraggableGrouping: true,
+
+      // pre-header will include our Header Grouping (i.e. "Common Factor")
+      // Draggable Grouping could be located in either the Pre-Header OR the new Top-Header
       createPreHeaderPanel: true,
       showPreHeaderPanel: true,
-      preHeaderPanelHeight: 40,
+      preHeaderPanelHeight: 30,
+
+      // when Top-Header is created, it will be used by the Draggable Grouping (otherwise the Pre-Header will be used)
+      createTopHeaderPanel: true,
+      showTopHeaderPanel: true,
+      topHeaderPanelHeight: 35,
+
       showCustomFooter: true,
       enableFiltering: true,
       // you could debounce/throttle the input text filter if you have lots of data
@@ -234,7 +244,9 @@ export class Example18 {
       draggableGrouping: {
         dropPlaceHolderText: 'Drop a column header here to group by the column',
         // groupIconCssClass: 'mdi mdi-drag-vertical',
-        deleteIconCssClass: 'mdi mdi-close',
+        deleteIconCssClass: 'mdi mdi-close text-color-danger',
+        sortAscIconCssClass: 'mdi mdi-arrow-up',
+        sortDescIconCssClass: 'mdi mdi-arrow-down',
         onGroupChanged: (_e, args) => this.onGroupChanged(args),
         onExtensionRegistered: (extension) => this.draggableGroupingPlugin = extension,
       },
diff --git a/test/cypress/e2e/example18.cy.ts b/test/cypress/e2e/example18.cy.ts
index 9005fb026..7e04e586d 100644
--- a/test/cypress/e2e/example18.cy.ts
+++ b/test/cypress/e2e/example18.cy.ts
@@ -1,5 +1,6 @@
 describe('Example 18 - Draggable Grouping & Aggregators', () => {
-  const fullTitles = ['Title', 'Duration', '% Complete', 'Start', 'Finish', 'Cost', 'Effort-Driven'];
+  const preHeaders = ['Common Factor', 'Period', 'Analysis', ''];
+  const fullTitles = ['Title', 'Duration', 'Start', 'Finish', 'Cost', '% Complete', 'Effort-Driven'];
   const GRID_ROW_HEIGHT = 35;
 
   it('should display Example title', () => {
@@ -7,13 +8,26 @@ describe('Example 18 - Draggable Grouping & Aggregators', () => {
     cy.get('h2').should('contain', 'Example 18: Draggable Grouping & Aggregators');
   });
 
-  it('should have exact column titles on 1st grid', () => {
+  it('should have exact column (pre-header) grouping titles in grid', () => {
     cy.get('#grid18')
-      .find('.slick-header-columns')
+      .find('.slick-preheader-panel .slick-header-columns')
+      .children()
+      .each(($child, index) => expect($child.text()).to.eq(preHeaders[index]));
+  });
+
+  it('should have exact column titles in grid', () => {
+    cy.get('#grid18')
+      .find('.slick-header:not(.slick-preheader-panel) .slick-header-columns')
       .children()
       .each(($child, index) => expect($child.text()).to.eq(fullTitles[index]));
   });
 
+  it('should have a draggable dropzone on top of the grid in the top-header section', () => {
+    cy.get('#grid18')
+      .find('.slick-topheader-panel .slick-dropzone:visible')
+      .contains('Drop a column header here to group by the column');
+  });
+
   describe('Grouping Tests', () => {
     it('should "Group by Duration & sort groups by value" then Collapse All and expect only group titles', () => {
       cy.get('[data-test="add-50k-rows-btn"]').click();
@@ -141,8 +155,8 @@ describe('Example 18 - Draggable Grouping & Aggregators', () => {
         .should('exist');
     });
 
-    it('should use the preheader Toggle All button and expect all groups to now be expanded', () => {
-      cy.get('.slick-preheader-panel .slick-group-toggle-all').click();
+    it('should use the topheader Toggle All button and expect all groups to now be expanded', () => {
+      cy.get('.slick-topheader-panel .slick-group-toggle-all').click();
 
       cy.get(`[style="top: ${GRID_ROW_HEIGHT * 0}px;"] > .slick-cell:nth(0) .slick-group-toggle.expanded`).should('have.length', 1);
       cy.get(`[style="top: ${GRID_ROW_HEIGHT * 0}px;"] > .slick-cell:nth(0) .slick-group-title`).should('contain', 'Effort-Driven: False');
@@ -153,8 +167,8 @@ describe('Example 18 - Draggable Grouping & Aggregators', () => {
         .should('have.css', 'marginLeft').and('eq', `15px`);
     });
 
-    it('should use the preheader Toggle All button again and expect all groups to now be collapsed', () => {
-      cy.get('.slick-preheader-panel .slick-group-toggle-all').click();
+    it('should use the topheader Toggle All button again and expect all groups to now be collapsed', () => {
+      cy.get('.slick-topheader-panel .slick-group-toggle-all').click();
 
       cy.get(`[style="top: ${GRID_ROW_HEIGHT * 0}px;"] > .slick-cell:nth(0) .slick-group-toggle.collapsed`).should('have.length', 1);
       cy.get(`[style="top: ${GRID_ROW_HEIGHT * 0}px;"] > .slick-cell:nth(0) .slick-group-title`).should('contain', 'Effort-Driven: False');