Screen lock: You can unlock the display in one of four ways: Slide, Pattern, PIN and Password. You can deactivate the screen lock as well by selecting None as well.
Tap Pattern, and use your finger on the screen (as illustrated) to draw an unlock pattern. Once you have set the unlock pattern, you will then be able to toggle Make pattern visible on/off.
After you have set and activated the pattern unlock function, the unlock keypad will be displayed whenever the display is to be unlocked. Use your finger to trace your preset pattern on the keypad. After the preset pattern has been correctly entered, the screen will be unlocked.
Tap PIN to input the PIN code (minimum 4 digits) you will use to unlock the display.
Tap Password to input the password (minimum 4 characters) you will use to unlock the display.