1. From the home screen, swipe down from the Notification bar.
   
2. Tap Screen rotation to lock/unlock the screen orientation.
   
3. To access additional display settings, tap the Settings icon.
   
4. Swipe to the MY DEVICE tab, then tap Display.
   
5. To access brightness settings, tap Brightness.
   
6. Drag the Brightness slider left or right to adjust the brightness manually.
   
7. To change the screen timeout, tap Screen timeout.
   
8. Tap the desired option.