1. From the home screen, press the Menu key.
   
2. Tap Settings.
   
3. Scroll to, then tap Display.
   
4. Scroll to, then tap Screen timeout to edit screen timeout settings.
   
5. To edit screen brightness, tap Brightness.
   
6. Touch and drag the Brightness slider to adjust, then tap OK.
   
7. To lock or unlock screen rotation, touch and drag down from the top of the screen to reveal the Notifications menu.
   
8. Tap Screen rotation to toggle on / off.