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BrightnessControl

How to Adjust Brightness on Windows 10

Windows 10 has more brightness entry points than Windows 11, though they all control the same internal panel. Here is each one, in order of convenience.

Method 1: Action Center

  1. Press Windows + A to open the Action Center.
  2. Use the brightness slider at the bottom of the panel.
  3. On some builds you click a brightness tile to cycle preset levels instead.

Method 2: Settings

  1. Press Windows + I and open System > Display.
  2. Drag Change brightness for the built-in display.
  3. Clear the automatic brightness checkbox if your device shows one.

Method 3: Windows Mobility Center

Press Windows + X and choose Mobility Center on laptops. It includes a display brightness slider alongside battery and volume controls.

Method 4: Keyboard keys

Function keys with sun icons remain the fastest option on laptops. If they do nothing, the OEM hotkey utility or display driver usually needs reinstalling.

Desktop monitors on Windows 10

Windows 10 has no interface for external monitor brightness. Use the monitor's buttons or a brightness utility; start with monitor brightness control and the Windows 10 brightness overview.

Frequently Asked Questions

Why is the Windows 10 brightness slider missing?

Either the PC is a desktop, where Windows provides no slider, or the display driver has been replaced by a generic one. Reinstalling the manufacturer's driver usually restores it.

Can I change brightness from the command line?

Windows exposes brightness through WMI on internal panels, so scripts can set it. For external monitors you need software that speaks DDC/CI.