1. Swipe down from the top of the screen to reveal the Notifications menu.
   
2. Tap the Settings icon.
   
3. Under My device, tap Lock screen.
   
4. Tap Screen lock.
   
5. Tap Pattern.
   
6. Draw the desired pattern, then tap Continue.
   
7. Redraw the desired pattern, then tap Confirm.
   
8. Enter the desired backup PIN, then tap Continue.
   
9. Re-enter the desired backup PIN, then tap OK.
   
10. To unlock the device, draw the selected pattern.