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You can adjust the screen brightness to your surroundings.
1. Find "Display"
Slide two fingers downwards starting from the top the screen.
Press the settings icon.
2. Adjust screen brightness
Press the indicator next to "Adaptive brightness" to turn automatic brightness on or off.
Press Brightness level.
Drag the brightness indicator right or left to select the required brightness level.
3. Return to the home screen
Press the Home key to return to the home screen.