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.
You can also adjust the screen brightness by using the Power panel.
Open the Activities overview and start typing Power.
Click Power to open the panel.
Adjust the Screen brightness slider to the value you want to use. The change should take effect immediately.
If your computer features an integrated light sensor, the screen brightness will automatically be adjusted for you. You can disable automatic screen brightness in the Power panel.
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 Tại sao màn hình mờ sau một khoảng thời gian?.
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