1. From the home screen, swipe down from the Notification bar.
   
2. Tap the Settings icon.
   
3. To adjust the screen brightness, under the 'Display' tab, drag the Brightness slider to the desired level.
   
4. Night brightness automatically reduces your screen brightness at night. Tap to toggle on/off.
   
5. Tap Auto-rotate screen to lock/unlock the screen orientation.
   
6. To change the screen timeout, tap Screen timeout.
   
7. Tap the desired option.