1. From the clock screen, swipe up from the bottom edge of the screen.
   
2. Scroll to, then tap Settings.
   
3. Tap Display.
   
4. To adjust the display brightness, tap Brightness.
   
5. Tap the Automatic checkbox to enable or disable automatic brightness.
   
6. Touch, then drag the Brightness slider to adjust the display brightness.
   
7. Tap OK.
   
8. To adjust the screen timeout duration, tap Screen timeout.
   
9. Tap the desired option.