Screen brightness level can be automatically adjusted or manually set.
Home screen, swipe up and then tap
- Use Automatic brightness to automatically adjust the screen brightness depending on your lighting environment. This feature is turned on by default.
If you want to manually set the screen brightness, tap the Automatic brightness On/Off switch to turn it off.
Brightness level, and then drag the slider.
This sets the maximum brightness level for Automatic brightness if this feature is turned on, or allows you to manually set the screen brightness if the feature is turned off.