Set screen brightness
Depending on your hardware, you can change the brightness of your screen to save power or to make the screen more readable in bright light.
To change the brightness of your screen, click the system menu on the right side of the top bar and adjust the screen brightness slider to the value you want to use. The change should take effect immediately.
Many laptop keyboards have special keys to adjust the brightness. These often have a picture that looks like the sun. Hold down the Fn key to use these keys.
If your computer features an integrated light sensor, the screen brightness will automatically be adjusted for you. For more information, see Enable automatic brightness.
If it is possible to set the brightness of your screen, you can also have the screen dim automatically to save power. For more information, see Why does my screen go dim after a while?.