Samsung Galaxy S6 edge+ User Manual page 373

 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: If you do not want the unlock pattern to display on the screen when you unlock it, from home, tap
Apps > Settings
ON/OFF next to Make pattern visible to turn it off.
Note: To change your unlock screen pattern, from home, tap Apps
and Security > Screen lock type.
Settings
> Lock Screen and Security > Secure lock settings, and then tap
> Settings > Lock Screen
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