Hotkeys

Brightness keyboard shortcuts for Windows 11 and 10.

Laptop brightness keys usually adjust the built-in screen. For external monitors, Display Dimmer adds configurable global hotkeys while the app is running, including when its window is hidden in the tray.

Quick setup: Open Display Dimmer > Settings > Hotkeys, choose your displays, edit a shortcut and click Apply. Close Settings, then try the shortcut. The initial defaults are shown below.

01

Open Hotkeys and choose your displays.

In Settings > Hotkeys, choose All Displays to adjust all displays with brightness control enabled. Pro also lets you target a specific display or linked group.

Default brightness hotkeys

Ctrl + Alt + Page UpBrightness up

Ctrl + Alt + Page DownBrightness down

Both initial shortcuts target All Displays with a Value of 10 for the brightness step. If you have changed or removed them, your saved shortcuts take precedence.

Display Dimmer Hotkeys tab showing the default All Displays brightness up and brightness down hotkeys.

02

Record a shortcut and choose an action.

Edit an existing row, or click Add hotkey if you have room. Click the key combo box, press your shortcut, choose Brightness up or Brightness down, enter a step in Value, then click Apply.

Free includes two hotkeys for All Displays. You can edit the two default rows; Pro adds more hotkeys and per-display targets. Compare Free and Pro.

Display Dimmer hotkey editor with the Ctrl Alt Page Up shortcut selected.

03

Detect brightness keys when supported.

If your keyboard exposes brightness keys to Windows, choose Brightness up or Brightness down, click Detect, press the matching key, then click Apply. Make sure each detected key uses the matching brightness action.

Some laptop Fn keys are handled by the device and are not exposed to apps. If Detect finds nothing, use a normal shortcut such as Ctrl + Alt + Page Up instead. There is no single Fn brightness combination that works on every keyboard.

Display Dimmer hotkey editor detecting the physical Brightness Up Key.

Hotkey behavior

Create shortcuts Windows can use reliably.

Hotkeys work globally while Display Dimmer is running. Enabled rows become active after you click Apply. If they are disabled, enable Hotkey support in General settings.

Important

Click Apply

Hotkey changes are not active until you click Apply.

Required

Use a modifier

Normal hotkeys need Ctrl, Alt, Shift, or Win. Modifier-only shortcuts are rejected.

Blocked

Common app shortcuts are blocked

Display Dimmer blocks Enter and common shortcuts like Ctrl+C, Ctrl+V, and Ctrl+S so it does not steal everyday commands.

Global

No duplicate shortcuts

Each enabled shortcut must be unique.

Actions

Choose what the shortcut does.

Brightness up/down and Contrast up/down use Value as the step and repeat while held. Set brightness and Set contrast use Value as the target level and run once. Reset levels, display enable, and automation actions run once without a value.

Display Dimmer Hotkeys action dropdown showing brightness, contrast, reset, display, and automation actions.

Shortcut conflicts

Pick a shortcut Windows can use.

If another app already owns a global shortcut, Windows may reject it. Choose combinations that are unlikely to belong to the active app.

Reliable

Add another modifier

Combinations like Ctrl + Alt are usually safer than plain one-modifier shortcuts.

Good keys

Page Up, arrows, or F keys

Page Up, Page Down, arrow keys, and function keys work well with modifiers.

Avoid

Avoid copy, paste, and save

Display Dimmer blocks common app shortcuts so it does not steal everyday commands.

Check rows

Do not reuse shortcuts

Each enabled shortcut must be unique. Change the old row before assigning the same hotkey somewhere else.

Troubleshooting

Shortcut not working?

Keep Display Dimmer running, enable Hotkey support in General settings, enable the row and click Apply. Close Settings before testing, and change shortcuts already used by Windows or another app.

Ready when you are

Control Display Dimmer from the keyboard.

If the shortcut works but a monitor does not change, test its slider in the app first. Set up external monitor brightness control or check DDC/CI support.

Pro also includes Temperature up, Temperature down, and Set temperature actions. Control blue light filtering from your keyboard.

Install free