Shortcuts
The URX Core75 uses a compact 75% ANSI layout (81 physical keys and 1 tactile rotary knob). To retain full keyboard features in a smaller form factor, the Core75 uses function layers accessed by holding down the FN key.
Wireless RGB and System Configs
These secondary commands work in both Windows and macOS modes:
Connection Profiles
| Combination | Profile / Mode | Description | Associated Indicator |
|---|---|---|---|
| FN + Q | Bluetooth Profile 1 | Switches the keyboard to Bluetooth channel 1. | Under-key LED glows static Blue when holding down FN if this profile is active. Blinks rapidly during pairing (Hold FN + Q), blinks slowly during reconnection. Blinks Red if physical switch blocks. |
| FN + W | Bluetooth Profile 2 | Switches the keyboard to Bluetooth channel 2. | Under-key LED glows static Blue when holding down FN if this profile is active. Blinks rapidly during pairing (Hold FN + W), blinks slowly during reconnection. Blinks Red if physical switch blocks. |
| FN + E | Bluetooth Profile 3 | Switches the keyboard to Bluetooth channel 3. | Under-key LED glows static Blue when holding down FN if this profile is active. Blinks rapidly during pairing (Hold FN + E), blinks slowly during reconnection. Blinks Red if physical switch blocks. |
| FN + R | 2.4GHz Wireless | Switches the keyboard to 2.4GHz wireless mode. | Under-key LED glows static Green when holding down FN if wireless mode is active. Blinks rapidly during pairing (Hold FN + R), blinks slowly during reconnection. Blinks Red if physical switch blocks. |
| FN + T | Wired USB Mode | Switches the keyboard to wired USB connection mode. | Under-key LED glows static White when holding down FN if wired mode is active. Blinks Red if USB cable is unplugged or unpowered. |
RGB Matrix Controls
| Combination | Control Action | Description | Associated Indicator |
|---|---|---|---|
| FN + Backspace | RGB Toggle | Turns the backlights and dynamic RGB animations on or off. | None |
| FN + \ | Next Animation Effect | Cycles forward to the next built-in RGB matrix lighting animation effect. | None |
| FN + PgUp | Next Palette+ | Cycles forward to the next built-in color palette. | None |
| FN + PgDn | Next Palette- | Cycles backward to the previous built-in color palette. | None |
| FN + ▲ (Up Arrow) | RGB Brightness Increase | Increases the backlight brightness level. | All keys blink White 3 times if maximum brightness limit is reached. |
| FN + ▼ (Down Arrow) | RGB Brightness Decrease | Decreases the backlight brightness level. | All keys blink White 3 times if minimum brightness limit is reached. |
| FN + ► (Right Arrow) | Animation Speed Increase | Speeds up the animation cycle speed of dynamic lighting effects. | All keys blink White 3 times if maximum speed limit is reached. |
| FN + ◄ (Left Arrow) | Animation Speed Decrease | Slows down the active dynamic lighting animation speed. | All keys blink White 3 times if minimum speed limit is reached. |
Custom Functions
| Combination | Function | Description | Associated Indicator |
|---|---|---|---|
| FN + S | OS Layout Toggle | Toggles the system layout layers between Windows (Layer 0) and macOS (Layer 1) modes. | Caps Lock LED blinks Yellow (1 time for Windows, 3 times for macOS). |
| FN + D | Sleep Standby Timer | Cycles the inactivity wireless sleep timeout (1m / 3m / 10m / 30m). | Function row keys F1-F12 light up in static Cyan representing the active minutes when holding FN. |
| FN + F | Wireless Max Brightness Unlock | Toggles the wireless brightness clamp on or off to allow full 255/255 brightness. | None (forces instant visual update of backlights). |
| FN + X | SOCD Cleaner Toggle | Toggles the Simultaneous Opposing Cardinal Directions cleaner for WASD keys. | S key glows static Red when holding down FN if active. |
| FN + Enter | Battery Level | Hold to display battery status. | Level: Proportional Green/Yellow/Red blocks. Charging: Green wave. Fully charged: Entire num row is solid Green. |
| FN + LWin | Windows Key Lock | Locks the Left and Right GUI (Windows) keys in Windows mode to prevent game interruptions. | Left Win key glows static White when active. |
| FN + LCtrl | RGB Test Mode | Enters the color check loop. Press Space to cycle Red -> Green -> Blue -> White, or press any other key (except Space, FN, or Left Ctrl) to exit. | All keys cycle colors. |
| FN + Space (Hold 3s) | Factory Reset / Clear EEPROM | Factory resets and clears all custom configurations. | Spacebar blinks Red for 3 seconds, then lights up solid Red for 1 second before resetting. |
FN Key Combinations
Windows Function Layer — Layer 2
When Windows layout is active, hold FN to access the secondary commands:
| Combination | Primary Key | Secondary Command |
|---|---|---|
| FN + F1 | F1 | Open My Computer |
| FN + F2 | F2 | Open File Explorer (Win + E) |
| FN + F3 | F3 | Open Calculator |
| FN + F4 | F4 | Open Email Client |
| FN + F5 | F5 | Open Media Player |
| FN + F6 | F6 | Stop Media Playback |
| FN + F7 | F7 | Previous Track |
| FN + F8 | F8 | Play / Pause Media |
| FN + F9 | F9 | Next Track |
| FN + F10 | F10 | Mute Volume |
| FN + F11 | F11 | Volume - |
| FN + F12 | F12 | Volume + |
| FN + Delete | Delete | Insert |
macOS Function Layer — Layer 3
When macOS layout is active, hold FN to temporarily restore standard functional keys:
| Combination | Primary Key | Secondary Command |
|---|---|---|
| FN + F1 | F1 (Brightness -) | Standard F1 Key |
| FN + F2 | F2 (Brightness +) | Standard F2 Key |
| FN + F3 | F3 (Mission Control) | Standard F3 Key |
| FN + F4 | F4 (Launchpad) | Standard F4 Key |
| FN + F5 | F5 | Standard F5 Key |
| FN + F6 | F6 | Standard F6 Key |
| FN + F7 | F7 (Previous Track) | Standard F7 Key |
| FN + F8 | F8 (Play / Pause) | Standard F8 Key |
| FN + F9 | F9 (Next Track) | Standard F9 Key |
| FN + F10 | F10 (Mute) | Standard F10 Key |
| FN + F11 | F11 (Volume -) | Standard F11 Key |
| FN + F12 | F12 (Volume +) | Standard F12 Key |
| FN + Delete | Delete | Insert |