1. Swipe down from the top of the screen with two fingers to reveal the quick settings menu.
   
2. Tap the Settings icon.
   
3. Scroll to 'PHONE', then tap Display & gestures.
   
4. To adjust the screen timeout duration, tap Screen timeout, then tap the desired option.
   
5. To adjust the screen brightness, tap Brightness level.
   
6. To lock or unlock screen rotation, tap Auto rotate screen.