1. From the home screen, swipe down from the top of the screen, then tap Screen rotation to lock/unlock the screen orientation.
   
2. To access additional display settings, tap the Settings icon.
   
3. Scroll to and tap Display.
   
4. Tap Brightness.
   
5. Tap the Auto-brightness checkbox to toggle automatic brightness on/off. Drag the Brightness slider left or right to adjust the brightness manually. Then tap OK.
   
6. Tap Screen timeout to change the screen timeout.
   
7. Tap the Desired option.