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You can adjust the screen brightness to your surroundings.
1. Find "brightness"
Slide your finger downwards starting from the top of the screen.
Press ALL SETTINGS.
2. Adjust screen brightness
Press the indicator next to "Automatically adjust" to turn automatic brightness on or off.
If you turn off the function, press the drop down list below "Level".
Press the required setting.
3. Return to the home screen
Press the Home key to return to the home screen.