Samsung Galaxy Tab S2 User Manual page 280

 The screen unlock pattern is saved.
5. Enter a backup PIN, tap Continue, re-enter the PIN, and tap OK to save your screen unlock
pattern.
 The screen lock is set.

If you fail to draw the correct unlock pattern on the screen after five attempts, you will be
prompted to wait for 30 seconds before you can try again.
Note: Clear the Make pattern visible check box if you do not want the unlock pattern to display on the
screen when you unlock it.
Note: To change your unlock screen pattern, from home, tap Apps
and Security > Screen lock type.
Settings
> Settings > Lock Screen
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