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You can adjust the screen brightness to your surroundings.
1. Find "Brightness level"
Slide your finger downwards starting from the top of the screen.
Press the settings icon.
Press Display & gestures.
Press Brightness level.
2. Adjust screen brightness
Press the field next to "Automatic brightness" to turn automatic brightness on or off.
Drag the 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.