Change your Mac display’s brightness
You can adjust the display’s brightness manually or automatically.
Use the brightness function keys
If the screen seems too light or too dark, you can adjust your display’s brightness.
On your Mac, press the increase brightness key or the decrease brightness key (or use the Control Strip).
Automatically adjust brightness
Manually adjust brightness
On your Mac, choose Apple menu > System Preferences, then click Displays .
Drag the Brightness slider to adjust the brightness of your display.
Depending on the type of display connected to your Mac, you may also see a Contrast slider that you can use to adjust the display’s contrast.
For specific information about the brightness of your display, check the documentation that came with your display.