1. To adjust the display brightness, swipe in from the right edge of the Start screen to display the Charm bar.
   
2. Tap on the Settings icon.
   
3. Touch and hold the Screen icon until the Brightness bar appears.
   
4. Slide up or down to adjust the level of screen brightness.
   
5. To turn off the auto screen rotation, at the top of the brightness slider, tap on the Screen Rotation Icon to lock screen orientation.
   
6. To unlock screen orientation, tap the Screen icon in the charm bar.
   
7. Tap the Lock Screen Rotation Icon to unlock.
   
8. To change the screen timeout period, tap Change PC Settings.
   
9. From the "PC settings" screen tap PC and devices.
   
10. Tap Power and Sleep.
    
11. Under sleep, tap on the Time interval field.
    
12. Select the desired Time interval.
    
13. You can also set the device to auto brightness by turning on the toggle for Adjust screen brightness automatically.