diff --git a/keybinding-generator/cli.mts b/keybinding-generator/cli.mts
index 29ef531dea..8f283a4501 100644
--- a/keybinding-generator/cli.mts
+++ b/keybinding-generator/cli.mts
@@ -8,6 +8,7 @@ import {
   generateKeybindings,
   generateKeybindingsForPrefixArgument,
   generateKeybindingsForTypeCharInRectMarkMode,
+  generateKeybindingsForRegisterCommands,
 } from "./generate-keybindings.mjs";
 
 const srcFilePath = "./keybindings.json";
@@ -32,6 +33,11 @@ keybindingSrcs.forEach((keybindingSrc) => {
     dstKeybindings.push(...generateKeybindingsForTypeCharInRectMarkMode());
     return;
   }
+  if (keybindingSrc.$special == "registerCommandTypes") {
+    console.log("Adding keybindings for register commands");
+    dstKeybindings.push(...generateKeybindingsForRegisterCommands());
+    return;
+  }
 
   if (!isKeyBindingSource(keybindingSrc)) {
     throw new Error(`${JSON.stringify(keybindingSrc)} is not a valid source`);
diff --git a/keybinding-generator/generate-keybindings.mts b/keybinding-generator/generate-keybindings.mts
index 799d87a1da..9430c09acb 100644
--- a/keybinding-generator/generate-keybindings.mts
+++ b/keybinding-generator/generate-keybindings.mts
@@ -296,3 +296,34 @@ export function generateKeybindingsForTypeCharInRectMarkMode(): KeyBinding[] {
 
   return keybindings;
 }
+
+export function generateKeybindingsForRegisterCommands(): KeyBinding[] {
+  const keybindings: KeyBinding[] = [];
+
+  // Ascii all printable characters excluding delete.
+  // Ref: https://www.ascii-code.com/
+  const asciiPrintableChars: string[] = [];
+  // ' ' ~ '~'
+  for (let charCode = 0x20; charCode <= 0x7e; charCode++) {
+    asciiPrintableChars.push(String.fromCharCode(charCode));
+  }
+
+  for (const char of asciiPrintableChars) {
+    keybindings.push({
+      key: char,
+      when: "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+      command: "emacs-mcx.RegisterSaveCommand",
+      args: [char],
+    });
+  }
+
+  for (const char of asciiPrintableChars) {
+    keybindings.push({
+      key: char,
+      when: "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+      command: "emacs-mcx.RegisterInsertCommand",
+      args: [char],
+    });
+  }
+  return keybindings;
+}
diff --git a/keybindings.json b/keybindings.json
index 1a836c2ff3..9d5aae00bf 100644
--- a/keybindings.json
+++ b/keybindings.json
@@ -745,6 +745,19 @@
       "command": "emacs-mcx.killRectangle",
       "when": "emacs-mcx.acceptingRectCommand && editorTextFocus"
     },
+    {
+      "key": "s", // ctrl+x r s
+      "command": "emacs-mcx.StartRegisterSaveCommand",
+      "when": "emacs-mcx.acceptingRectCommand && editorTextFocus"
+    },
+    {
+      "key": "i", // ctrl+x r i
+      "command": "emacs-mcx.StartRegisterInsertCommand",
+      "when": "emacs-mcx.acceptingRectCommand && editorTextFocus"
+    },
+    {
+      "$special": "registerCommandTypes"
+    },
     {
       "key": "y", // ctrl+x r y
       "command": "emacs-mcx.yankRectangle",
diff --git a/package.json b/package.json
index 34f4d68d82..cea4072032 100644
--- a/package.json
+++ b/package.json
@@ -3958,6 +3958,1536 @@
         "command": "emacs-mcx.killRectangle",
         "when": "emacs-mcx.acceptingRectCommand && editorTextFocus"
       },
+      {
+        "key": "s",
+        "command": "emacs-mcx.StartRegisterSaveCommand",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus"
+      },
+      {
+        "key": "i",
+        "command": "emacs-mcx.StartRegisterInsertCommand",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus"
+      },
+      {
+        "key": " ",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          " "
+        ]
+      },
+      {
+        "key": "!",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "!"
+        ]
+      },
+      {
+        "key": "\"",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "\""
+        ]
+      },
+      {
+        "key": "#",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "#"
+        ]
+      },
+      {
+        "key": "$",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "$"
+        ]
+      },
+      {
+        "key": "%",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "%"
+        ]
+      },
+      {
+        "key": "&",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "&"
+        ]
+      },
+      {
+        "key": "'",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "'"
+        ]
+      },
+      {
+        "key": "(",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "("
+        ]
+      },
+      {
+        "key": ")",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          ")"
+        ]
+      },
+      {
+        "key": "*",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "*"
+        ]
+      },
+      {
+        "key": "+",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "+"
+        ]
+      },
+      {
+        "key": ",",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          ","
+        ]
+      },
+      {
+        "key": "-",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "-"
+        ]
+      },
+      {
+        "key": ".",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "."
+        ]
+      },
+      {
+        "key": "/",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "/"
+        ]
+      },
+      {
+        "key": "0",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "0"
+        ]
+      },
+      {
+        "key": "1",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "1"
+        ]
+      },
+      {
+        "key": "2",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "2"
+        ]
+      },
+      {
+        "key": "3",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "3"
+        ]
+      },
+      {
+        "key": "4",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "4"
+        ]
+      },
+      {
+        "key": "5",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "5"
+        ]
+      },
+      {
+        "key": "6",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "6"
+        ]
+      },
+      {
+        "key": "7",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "7"
+        ]
+      },
+      {
+        "key": "8",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "8"
+        ]
+      },
+      {
+        "key": "9",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "9"
+        ]
+      },
+      {
+        "key": ":",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          ":"
+        ]
+      },
+      {
+        "key": ";",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          ";"
+        ]
+      },
+      {
+        "key": "<",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "<"
+        ]
+      },
+      {
+        "key": "=",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "="
+        ]
+      },
+      {
+        "key": ">",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          ">"
+        ]
+      },
+      {
+        "key": "?",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "?"
+        ]
+      },
+      {
+        "key": "@",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "@"
+        ]
+      },
+      {
+        "key": "A",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "A"
+        ]
+      },
+      {
+        "key": "B",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "B"
+        ]
+      },
+      {
+        "key": "C",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "C"
+        ]
+      },
+      {
+        "key": "D",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "D"
+        ]
+      },
+      {
+        "key": "E",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "E"
+        ]
+      },
+      {
+        "key": "F",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "F"
+        ]
+      },
+      {
+        "key": "G",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "G"
+        ]
+      },
+      {
+        "key": "H",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "H"
+        ]
+      },
+      {
+        "key": "I",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "I"
+        ]
+      },
+      {
+        "key": "J",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "J"
+        ]
+      },
+      {
+        "key": "K",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "K"
+        ]
+      },
+      {
+        "key": "L",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "L"
+        ]
+      },
+      {
+        "key": "M",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "M"
+        ]
+      },
+      {
+        "key": "N",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "N"
+        ]
+      },
+      {
+        "key": "O",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "O"
+        ]
+      },
+      {
+        "key": "P",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "P"
+        ]
+      },
+      {
+        "key": "Q",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "Q"
+        ]
+      },
+      {
+        "key": "R",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "R"
+        ]
+      },
+      {
+        "key": "S",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "S"
+        ]
+      },
+      {
+        "key": "T",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "T"
+        ]
+      },
+      {
+        "key": "U",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "U"
+        ]
+      },
+      {
+        "key": "V",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "V"
+        ]
+      },
+      {
+        "key": "W",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "W"
+        ]
+      },
+      {
+        "key": "X",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "X"
+        ]
+      },
+      {
+        "key": "Y",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "Y"
+        ]
+      },
+      {
+        "key": "Z",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "Z"
+        ]
+      },
+      {
+        "key": "[",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "["
+        ]
+      },
+      {
+        "key": "\\",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "\\"
+        ]
+      },
+      {
+        "key": "]",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "]"
+        ]
+      },
+      {
+        "key": "^",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "^"
+        ]
+      },
+      {
+        "key": "_",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "_"
+        ]
+      },
+      {
+        "key": "`",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "`"
+        ]
+      },
+      {
+        "key": "a",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "a"
+        ]
+      },
+      {
+        "key": "b",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "b"
+        ]
+      },
+      {
+        "key": "c",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "c"
+        ]
+      },
+      {
+        "key": "d",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "d"
+        ]
+      },
+      {
+        "key": "e",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "e"
+        ]
+      },
+      {
+        "key": "f",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "f"
+        ]
+      },
+      {
+        "key": "g",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "g"
+        ]
+      },
+      {
+        "key": "h",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "h"
+        ]
+      },
+      {
+        "key": "i",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "i"
+        ]
+      },
+      {
+        "key": "j",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "j"
+        ]
+      },
+      {
+        "key": "k",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "k"
+        ]
+      },
+      {
+        "key": "l",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "l"
+        ]
+      },
+      {
+        "key": "m",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "m"
+        ]
+      },
+      {
+        "key": "n",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "n"
+        ]
+      },
+      {
+        "key": "o",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "o"
+        ]
+      },
+      {
+        "key": "p",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "p"
+        ]
+      },
+      {
+        "key": "q",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "q"
+        ]
+      },
+      {
+        "key": "r",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "r"
+        ]
+      },
+      {
+        "key": "s",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "s"
+        ]
+      },
+      {
+        "key": "t",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "t"
+        ]
+      },
+      {
+        "key": "u",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "u"
+        ]
+      },
+      {
+        "key": "v",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "v"
+        ]
+      },
+      {
+        "key": "w",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "w"
+        ]
+      },
+      {
+        "key": "x",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "x"
+        ]
+      },
+      {
+        "key": "y",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "y"
+        ]
+      },
+      {
+        "key": "z",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "z"
+        ]
+      },
+      {
+        "key": "{",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "{"
+        ]
+      },
+      {
+        "key": "|",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "|"
+        ]
+      },
+      {
+        "key": "}",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "}"
+        ]
+      },
+      {
+        "key": "~",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterSaveMode",
+        "command": "emacs-mcx.RegisterSaveCommand",
+        "args": [
+          "~"
+        ]
+      },
+      {
+        "key": " ",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          " "
+        ]
+      },
+      {
+        "key": "!",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "!"
+        ]
+      },
+      {
+        "key": "\"",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "\""
+        ]
+      },
+      {
+        "key": "#",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "#"
+        ]
+      },
+      {
+        "key": "$",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "$"
+        ]
+      },
+      {
+        "key": "%",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "%"
+        ]
+      },
+      {
+        "key": "&",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "&"
+        ]
+      },
+      {
+        "key": "'",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "'"
+        ]
+      },
+      {
+        "key": "(",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "("
+        ]
+      },
+      {
+        "key": ")",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          ")"
+        ]
+      },
+      {
+        "key": "*",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "*"
+        ]
+      },
+      {
+        "key": "+",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "+"
+        ]
+      },
+      {
+        "key": ",",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          ","
+        ]
+      },
+      {
+        "key": "-",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "-"
+        ]
+      },
+      {
+        "key": ".",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "."
+        ]
+      },
+      {
+        "key": "/",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "/"
+        ]
+      },
+      {
+        "key": "0",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "0"
+        ]
+      },
+      {
+        "key": "1",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "1"
+        ]
+      },
+      {
+        "key": "2",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "2"
+        ]
+      },
+      {
+        "key": "3",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "3"
+        ]
+      },
+      {
+        "key": "4",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "4"
+        ]
+      },
+      {
+        "key": "5",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "5"
+        ]
+      },
+      {
+        "key": "6",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "6"
+        ]
+      },
+      {
+        "key": "7",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "7"
+        ]
+      },
+      {
+        "key": "8",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "8"
+        ]
+      },
+      {
+        "key": "9",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "9"
+        ]
+      },
+      {
+        "key": ":",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          ":"
+        ]
+      },
+      {
+        "key": ";",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          ";"
+        ]
+      },
+      {
+        "key": "<",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "<"
+        ]
+      },
+      {
+        "key": "=",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "="
+        ]
+      },
+      {
+        "key": ">",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          ">"
+        ]
+      },
+      {
+        "key": "?",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "?"
+        ]
+      },
+      {
+        "key": "@",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "@"
+        ]
+      },
+      {
+        "key": "A",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "A"
+        ]
+      },
+      {
+        "key": "B",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "B"
+        ]
+      },
+      {
+        "key": "C",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "C"
+        ]
+      },
+      {
+        "key": "D",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "D"
+        ]
+      },
+      {
+        "key": "E",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "E"
+        ]
+      },
+      {
+        "key": "F",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "F"
+        ]
+      },
+      {
+        "key": "G",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "G"
+        ]
+      },
+      {
+        "key": "H",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "H"
+        ]
+      },
+      {
+        "key": "I",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "I"
+        ]
+      },
+      {
+        "key": "J",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "J"
+        ]
+      },
+      {
+        "key": "K",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "K"
+        ]
+      },
+      {
+        "key": "L",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "L"
+        ]
+      },
+      {
+        "key": "M",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "M"
+        ]
+      },
+      {
+        "key": "N",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "N"
+        ]
+      },
+      {
+        "key": "O",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "O"
+        ]
+      },
+      {
+        "key": "P",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "P"
+        ]
+      },
+      {
+        "key": "Q",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "Q"
+        ]
+      },
+      {
+        "key": "R",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "R"
+        ]
+      },
+      {
+        "key": "S",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "S"
+        ]
+      },
+      {
+        "key": "T",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "T"
+        ]
+      },
+      {
+        "key": "U",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "U"
+        ]
+      },
+      {
+        "key": "V",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "V"
+        ]
+      },
+      {
+        "key": "W",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "W"
+        ]
+      },
+      {
+        "key": "X",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "X"
+        ]
+      },
+      {
+        "key": "Y",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "Y"
+        ]
+      },
+      {
+        "key": "Z",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "Z"
+        ]
+      },
+      {
+        "key": "[",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "["
+        ]
+      },
+      {
+        "key": "\\",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "\\"
+        ]
+      },
+      {
+        "key": "]",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "]"
+        ]
+      },
+      {
+        "key": "^",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "^"
+        ]
+      },
+      {
+        "key": "_",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "_"
+        ]
+      },
+      {
+        "key": "`",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "`"
+        ]
+      },
+      {
+        "key": "a",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "a"
+        ]
+      },
+      {
+        "key": "b",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "b"
+        ]
+      },
+      {
+        "key": "c",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "c"
+        ]
+      },
+      {
+        "key": "d",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "d"
+        ]
+      },
+      {
+        "key": "e",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "e"
+        ]
+      },
+      {
+        "key": "f",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "f"
+        ]
+      },
+      {
+        "key": "g",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "g"
+        ]
+      },
+      {
+        "key": "h",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "h"
+        ]
+      },
+      {
+        "key": "i",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "i"
+        ]
+      },
+      {
+        "key": "j",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "j"
+        ]
+      },
+      {
+        "key": "k",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "k"
+        ]
+      },
+      {
+        "key": "l",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "l"
+        ]
+      },
+      {
+        "key": "m",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "m"
+        ]
+      },
+      {
+        "key": "n",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "n"
+        ]
+      },
+      {
+        "key": "o",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "o"
+        ]
+      },
+      {
+        "key": "p",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "p"
+        ]
+      },
+      {
+        "key": "q",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "q"
+        ]
+      },
+      {
+        "key": "r",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "r"
+        ]
+      },
+      {
+        "key": "s",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "s"
+        ]
+      },
+      {
+        "key": "t",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "t"
+        ]
+      },
+      {
+        "key": "u",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "u"
+        ]
+      },
+      {
+        "key": "v",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "v"
+        ]
+      },
+      {
+        "key": "w",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "w"
+        ]
+      },
+      {
+        "key": "x",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "x"
+        ]
+      },
+      {
+        "key": "y",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "y"
+        ]
+      },
+      {
+        "key": "z",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "z"
+        ]
+      },
+      {
+        "key": "{",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "{"
+        ]
+      },
+      {
+        "key": "|",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "|"
+        ]
+      },
+      {
+        "key": "}",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "}"
+        ]
+      },
+      {
+        "key": "~",
+        "when": "emacs-mcx.acceptingRectCommand && editorTextFocus && emacs-mcx.inRegisterInsertMode",
+        "command": "emacs-mcx.RegisterInsertCommand",
+        "args": [
+          "~"
+        ]
+      },
       {
         "key": "y",
         "command": "emacs-mcx.yankRectangle",
diff --git a/src/commands/registers.ts b/src/commands/registers.ts
new file mode 100644
index 0000000000..388f48d266
--- /dev/null
+++ b/src/commands/registers.ts
@@ -0,0 +1,56 @@
+import * as vscode from "vscode";
+import { EmacsCommand, IEmacsCommandInterrupted } from ".";
+
+// Will bind this this to C-x r s
+export class StartRegisterSaveCommand extends EmacsCommand implements IEmacsCommandInterrupted {
+  public readonly id = "StartRegisterSaveCommand";
+
+  private acceptingRegisterSaveCommand = false;
+
+  private startRegisterSaveCommand(): void {
+    this.acceptingRegisterSaveCommand = true;
+    vscode.commands.executeCommand("setContext", "emacs-mcx.inRegisterSaveMode", true);
+  }
+
+  private stopRegisterSaveCommand(): void {
+    this.acceptingRegisterSaveCommand = false;
+    vscode.commands.executeCommand("setContext", "emacs-mcx.inRegisterSaveMode", false);
+  }
+
+  public execute(): void {
+    this.startRegisterSaveCommand();
+  }
+
+  public onDidInterruptTextEditor(): void {
+    if (this.acceptingRegisterSaveCommand) {
+      this.stopRegisterSaveCommand();
+    }
+  }
+}
+
+// Will bind this this to C-x r i
+export class StartRegisterInsertCommand extends EmacsCommand implements IEmacsCommandInterrupted {
+  public readonly id = "StartRegisterInsertCommand";
+
+  private acceptingRegisterInsertCommand = false;
+
+  public startRegisterInsertCommand(): void {
+    this.acceptingRegisterInsertCommand = true;
+    vscode.commands.executeCommand("setContext", "emacs-mcx.inRegisterInsertMode", true);
+  }
+
+  private stopRegisterInsertCommand(): void {
+    this.acceptingRegisterInsertCommand = false;
+    vscode.commands.executeCommand("setContext", "emacs-mcx.inRegisterInsertMode", false);
+  }
+
+  public execute(): void {
+    this.startRegisterInsertCommand();
+  }
+
+  public onDidInterruptTextEditor(): void {
+    if (this.acceptingRegisterInsertCommand) {
+      this.stopRegisterInsertCommand();
+    }
+  }
+}
diff --git a/src/emulator-map.ts b/src/emulator-map.ts
index 8be96e2a92..2bebe30f14 100644
--- a/src/emulator-map.ts
+++ b/src/emulator-map.ts
@@ -7,11 +7,13 @@ export class EmacsEmulatorMap {
   private emacsEmulatorMap: Map<string, EmacsEmulator>;
   private killRing: KillRing;
   private minibuffer: Minibuffer;
+  private textRegister: Map<string, string>;
 
-  constructor(killRing: KillRing, minibuffer: Minibuffer) {
+  constructor(killRing: KillRing, minibuffer: Minibuffer, textRegister: Map<string, string>) {
     this.emacsEmulatorMap = new Map();
     this.killRing = killRing;
     this.minibuffer = minibuffer;
+    this.textRegister = textRegister;
   }
 
   public getOrCreate(editor: TextEditor): [EmacsEmulator, boolean] {
@@ -22,7 +24,7 @@ export class EmacsEmulatorMap {
 
     if (!emacsEmulator) {
       isNew = true;
-      emacsEmulator = new EmacsEmulator(editor, this.killRing, this.minibuffer);
+      emacsEmulator = new EmacsEmulator(editor, this.killRing, this.minibuffer, this.textRegister);
       this.emacsEmulatorMap.set(editorId, emacsEmulator);
     } else {
       emacsEmulator.setTextEditor(editor);
diff --git a/src/emulator.ts b/src/emulator.ts
index 1da75a349c..9c6ea8728b 100644
--- a/src/emulator.ts
+++ b/src/emulator.ts
@@ -10,6 +10,8 @@ import * as KillCommands from "./commands/kill";
 import * as MoveCommands from "./commands/move";
 import * as PareditCommands from "./commands/paredit";
 import * as RectangleCommands from "./commands/rectangle";
+import { StartRegisterSaveCommand, StartRegisterInsertCommand } from "./commands/registers";
+import { getNonEmptySelections } from "./commands/helpers/selection";
 import { RecenterTopBottom } from "./commands/recenter";
 import { EmacsCommandRegistry } from "./commands/registry";
 import { KillYanker } from "./kill-yank";
@@ -40,6 +42,7 @@ export interface IEmacsController {
 
 export class EmacsEmulator implements IEmacsController, vscode.Disposable {
   private textEditor: TextEditor;
+  private textRegister: Map<string, string>;
 
   private commandRegistry: EmacsCommandRegistry;
 
@@ -121,10 +124,12 @@ export class EmacsEmulator implements IEmacsController, vscode.Disposable {
     textEditor: TextEditor,
     killRing: KillRing | null = null,
     minibuffer: Minibuffer = new InputBoxMinibuffer(),
+    textRegister: Map<string, string> = new Map(),
   ) {
     this.textEditor = textEditor;
     this.setNativeSelections(this.rectMode ? [] : textEditor.selections); // TODO: `[]` is workaround.
 
+    this.textRegister = textRegister;
     this.markRing = new MarkRing(Configuration.instance.markRingMax);
     this.prevExchangedMarks = null;
 
@@ -186,6 +191,9 @@ export class EmacsEmulator implements IEmacsController, vscode.Disposable {
     this.killYanker = killYanker; // TODO: To be removed
     this.registerDisposable(killYanker);
 
+    this.commandRegistry.register(new StartRegisterSaveCommand(this));
+    this.commandRegistry.register(new StartRegisterInsertCommand(this));
+
     const rectangleState: RectangleCommands.RectangleState = {
       latestKilledRectangle: [],
     };
@@ -612,4 +620,59 @@ export class EmacsEmulator implements IEmacsController, vscode.Disposable {
       }
     });
   }
+
+  public saveRegister(arg: string): void {
+    const selectionsAfterRectDisabled =
+      this.inRectMarkMode &&
+      this.nativeSelections.map((selection) => {
+        const newLine = selection.active.line;
+        const newChar = Math.min(selection.active.character, selection.anchor.character);
+        return new vscode.Selection(newLine, newChar, newLine, newChar);
+      });
+    const selections = getNonEmptySelections(this.textEditor);
+    if (selectionsAfterRectDisabled) {
+      this.textEditor.selections = selectionsAfterRectDisabled;
+    }
+    // selections is now a list of non empty selections, iterate through them and
+    // build a single variable combinedtext
+    let i = 0;
+    let combinedtext = "";
+    while (i < selections.length) {
+      combinedtext = combinedtext + this.textEditor.document.getText(selections[i]);
+      i++;
+    }
+
+    const register_string = arg;
+    if (register_string == null) {
+      return;
+    }
+
+    this.textRegister.set(register_string, combinedtext);
+    // After copying the selection, get out of mark mode and de-select the selections
+    this.exitMarkMode();
+    this.makeSelectionsEmpty();
+  }
+
+  public async insertRegister(arg: string): Promise<void> {
+    if (!this.textRegister.has(arg)) {
+      return;
+    }
+
+    const textToInsert = this.textRegister.get(arg);
+    if (textToInsert == undefined) {
+      return;
+    }
+    // Looking for how to insert-replace with selections highlighted.... must copy-paste from Yank command
+    const selections = this.textEditor.selections;
+
+    await this.textEditor.edit((editBuilder) => {
+      selections.forEach((selection) => {
+        if (!selection.isEmpty) {
+          editBuilder.delete(selection);
+        }
+        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+        editBuilder.insert(selection.start, textToInsert);
+      });
+    });
+  }
 }
diff --git a/src/extension.ts b/src/extension.ts
index 3a237eea57..f91523f0cb 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -22,8 +22,9 @@ export function activate(context: vscode.ExtensionContext): void {
 
   const killRing = new KillRing(Configuration.instance.killRingMax);
   const minibuffer = new InputBoxMinibuffer();
+  const textRegister = new Map<string, string>();
 
-  const emulatorMap = new EmacsEmulatorMap(killRing, minibuffer);
+  const emulatorMap = new EmacsEmulatorMap(killRing, minibuffer, textRegister);
 
   function getAndUpdateEmulator() {
     const activeTextEditor = vscode.window.activeTextEditor;
@@ -358,6 +359,36 @@ export function activate(context: vscode.ExtensionContext): void {
     emulator.runCommand("paredit.backwardKillSexp");
   });
 
+  registerEmulatorCommand("emacs-mcx.StartRegisterSaveCommand", (emulator) => {
+    return emulator.runCommand("StartRegisterSaveCommand");
+  });
+
+  registerEmulatorCommand("emacs-mcx.StartRegisterInsertCommand", (emulator) => {
+    return emulator.runCommand("StartRegisterInsertCommand");
+  });
+
+  registerEmulatorCommand("emacs-mcx.RegisterSaveCommand", (emulator, args) => {
+    if (!Array.isArray(args)) {
+      return;
+    }
+    const arg = args[0];
+    if (typeof arg !== "string") {
+      return;
+    }
+    return emulator.saveRegister(arg);
+  });
+
+  registerEmulatorCommand("emacs-mcx.RegisterInsertCommand", (emulator, args) => {
+    if (!Array.isArray(args)) {
+      return;
+    }
+    const arg = args[0];
+    if (typeof arg !== "string") {
+      return;
+    }
+    return emulator.insertRegister(arg);
+  });
+
   vscode.commands.registerCommand("emacs-mcx.executeCommands", async (...args: any[]) => {
     if (1 <= args.length) {
       executeCommands(args[0]);