1. From any screen, swipe down from the notification bar.
   
2. Tap Settings.
   
3. Tap Display & Sounds.
   
4. Display & Sounds settings will be displayed.
   
5. To change screen time out, tap Display Sleep.
   
6. Tap the desired option.
   
7. Touch and drag the Brightness slider to adjust screen brightness.
   
8. To lock or unlock the screen orientation, from any screen, swipe down from the notification bar.
   
9. Tap Auto-Rotate to toggle screen orientation on or off.