1. To change the screen time out, from the Settings menu, scroll to and tap the Display tab.
   
2. Tap Screen timeout.
   
3. Tap the Desired timeout length.
   
4. To adjust screen brightness, tap the Auto checkbox.
   
5. Adjust brightness by moving the Brightness toggle left or right.
   
6. To lock or unlock screen orientation, tap the Auto-rotate screen checkbox.
   
7. To enter Reader Mode, which makes the tablet like an e-reader (for low-light conditions), swipe down from the top of the screen and tap Reader Mode to turn on or off.