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Xiaomi Redmi 9AT
Android 10.0
1 Find "Display"
Press Settings.
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Press Display.
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2 Adjust screen brightness
Press Brightness level.
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Press the indicator next to "Automatic brightness" to turn the function on or off.
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Drag the brightness indicator right or left to select the required brightness level.
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3 Return to the home screen
Press the Home key to return to the home screen.
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