1. From the home screen, swipe down from the Notification bar with two fingers.
   
2. Tap the Settings icon.
   
3. Scroll to then tap Display.
   
4. To adjust the brightness, tap Brightness level.
   
5. Drag the Brightness slider to the desired level.
   
6. Tap the Adaptive brightness switch to toggle on/off.
   
7. Tap Sleep to adjust the screen timeout.
   
8. Tap the desired option.