diff --git a/app/include/dt-bindings/zmk/keys.h b/app/include/dt-bindings/zmk/keys.h
index 364ffa86..0d30b0fb 100644
--- a/app/include/dt-bindings/zmk/keys.h
+++ b/app/include/dt-bindings/zmk/keys.h
@@ -1443,3 +1443,6 @@
 /* Apple Globe key */
 #define C_AC_NEXT_KEYBOARD_LAYOUT_SELECT (ZMK_HID_USAGE(HID_USAGE_CONSUMER, 0x029D))
 #define GLOBE (C_AC_NEXT_KEYBOARD_LAYOUT_SELECT)
+
+/* Microsoft Copilot key */
+#define COPILOT LS(LG(F23))
diff --git a/app/include/dt-bindings/zmk/modifiers.h b/app/include/dt-bindings/zmk/modifiers.h
index b49849d0..01dfca46 100644
--- a/app/include/dt-bindings/zmk/modifiers.h
+++ b/app/include/dt-bindings/zmk/modifiers.h
@@ -25,4 +25,21 @@
 #define RC(keycode) APPLY_MODS(MOD_RCTL, keycode)
 #define RS(keycode) APPLY_MODS(MOD_RSFT, keycode)
 #define RA(keycode) APPLY_MODS(MOD_RALT, keycode)
-#define RG(keycode) APPLY_MODS(MOD_RGUI, keycode)
\ No newline at end of file
+#define RG(keycode) APPLY_MODS(MOD_RGUI, keycode)
+
+#define LEFT_HYPER LS(LC(LA(LGUI)))
+#define LH(key) LS(LC(LA(LG(key))))
+#define LHYPER LEFT_HYPER
+#define OFFICE LEFT_HYPER
+
+#define LEFT_MEH LS(LC(LALT))
+#define LM(key) LS(LC(LA(key)))
+#define LMEH LEFT_MEH
+
+#define RIGHT_HYPER RS(RC(RA(RGUI)))
+#define RH(key) RS(RC(RA(RG(key))))
+#define RHYPER RIGHT_HYPER
+
+#define RIGHT_MEH RS(RC(RALT))
+#define RM(key) RS(RC(RA(key)))
+#define RMEH RIGHT_MEH
diff --git a/docs/docs/codes/modifiers.mdx b/docs/docs/codes/modifiers.mdx
index db88ee92..56d17029 100644
--- a/docs/docs/codes/modifiers.mdx
+++ b/docs/docs/codes/modifiers.mdx
@@ -46,3 +46,33 @@ These functions take the form: `XX(code)`
   - `LS(x)`, `LC(x)`, `LA(x)`, `LG(x)`, `RS(x)`, `RC(x)`, `RA(x)`, `RG(x)`
 - Modified keys can safely be rolled-over. Modifier functions are released when another key is pressed.
   - Press `&kp LS(A)`, then press `&kp B`, release `&kp LS(A)` and release `&kp B` results in **Ab**. Only the A is capitalized.
+
+### Extra Modifiers
+
+Extra modifiers are combinations of the special keyboard keys: _shift_, _alt_, _control_ & _GUI_.
+
+Extra Modifiers can be used in the following forms within ZMK:
+
+- `LHYPER`
+- `LH(code)`
+
+<Table group="keyboard-extra-modifiers" />
+
+The combination of all modifiers `SHIFT`, `GUI`, `ALT` and `CONTROL` is colloquially known as `HYPER`.
+Similarly, the combination of `SHIFT`, `ALT` and `CONTROL` (without `GUI`) is referred to as `MEH`.
+
+### Extra Modifier Keys
+
+These act like any other key code.
+
+- e.g. `&kp LHYPER` pushes and releases the combination of the left modifiers SHIFT, GUI, ALT and CONTROL.
+
+### Extra Modifier Functions
+
+Modifier functions add one or more modifiers to a code.
+
+These functions take the form: `XX(code)`
+
+- Modifier functions apply a modifier to a code:
+  - `&kp LH(W)` = `LEFT SHIFT` + `LEFT GUI` + `LEFT CONTROL` + `LEFT ALT` + `W`; in recent versions of Windows, this will open Microsoft Word.
+- There are left- and right-handed versions of each extra modifier (also see table above).
diff --git a/docs/src/data/groups.js b/docs/src/data/groups.js
index 5a8dc3cf..d8b053ab 100644
--- a/docs/src/data/groups.js
+++ b/docs/src/data/groups.js
@@ -276,6 +276,12 @@ export default {
     "LEFT_GUI",
     "RIGHT_GUI",
   ],
+  "keyboard-extra-modifiers": [
+    "LEFT_MEH",
+    "RIGHT_MEH",
+    "LEFT_HYPER",
+    "RIGHT_HYPER",
+  ],
   "keyboard-navigation": [
     "HOME",
     "END",
diff --git a/docs/src/data/hid.js b/docs/src/data/hid.js
index 92b5021f..6a3836ac 100644
--- a/docs/src/data/hid.js
+++ b/docs/src/data/hid.js
@@ -4251,6 +4251,90 @@ export default [
     },
     footnotes: {},
   },
+  {
+    names: ["LEFT_HYPER", "LHYPER", "OFFICE", "LH(code)"],
+    description: "Left Hyper: Left SHIFT, GUI, ALT, CONTROL",
+    context: "Keyboard",
+    clarify: false,
+    usages: [
+      {
+        application: keyboardApplication,
+        item: usage(keyPage, 0xe1),
+      },
+    ],
+    documentation: "",
+    os: {
+      windows: true,
+      linux: true,
+      android: true,
+      macos: null,
+      ios: null,
+    },
+    footnotes: {},
+  },
+  {
+    names: ["RIGHT_HYPER", "RHYPER", "RH(code)"],
+    description: "Right HYPER: Right SHIFT, GUI, ALT, CONTROL",
+    context: "Keyboard",
+    clarify: false,
+    usages: [
+      {
+        application: keyboardApplication,
+        item: usage(keyPage, 0xe1),
+      },
+    ],
+    documentation: "",
+    os: {
+      windows: true,
+      linux: true,
+      android: true,
+      macos: null,
+      ios: null,
+    },
+    footnotes: {},
+  },
+  {
+    names: ["LEFT_MEH", "LM(code)"],
+    description: "Left MEH: Left SHIFT, ALT, CONTROL",
+    context: "Keyboard",
+    clarify: false,
+    usages: [
+      {
+        application: keyboardApplication,
+        item: usage(keyPage, 0xe1),
+      },
+    ],
+    documentation: "",
+    os: {
+      windows: true,
+      linux: true,
+      android: true,
+      macos: null,
+      ios: null,
+    },
+    footnotes: {},
+  },
+  {
+    names: ["RIGHT_MEH", "RM(code)"],
+    description: "Right MEH: Right SHIFT, ALT, CONTROL",
+    context: "Keyboard",
+    clarify: false,
+    usages: [
+      {
+        application: keyboardApplication,
+        item: usage(keyPage, 0xe1),
+      },
+    ],
+    documentation: "",
+    os: {
+      windows: true,
+      linux: true,
+      android: true,
+      macos: null,
+      ios: null,
+    },
+    footnotes: {},
+  },
   {
     names: ["K_PLAY_PAUSE", "K_PP"],
     description: "Play / Pause",
@@ -7888,4 +7972,25 @@ export default [
       macos: ["globe"],
     },
   },
+  {
+    names: ["COPILOT"],
+    description: "Microsoft Copilot shortcut LS(LG(F23))",
+    context: "Keyboard",
+    clarify: false,
+    usages: [
+      {
+        application: keyboardApplication,
+        item: usage(keyPage, 0x72),
+      },
+    ],
+    documentation: "https://usb.org/sites/default/files/hut1_2.pdf#page=86",
+    os: {
+      windows: true,
+      linux: null,
+      android: null,
+      macos: null,
+      ios: null,
+    },
+    footnotes: {},
+  },
 ];