Samsung Galaxy S 6 edge User Manual page 376

Note: To change your unlock screen pattern, from home, tap Apps
and Security > Screen lock type.
Use a Screen Unlock PIN
1. From the Screen lock type menu, tap PIN.
2. Enter a PIN, tap CONTINUE, re-enter your PIN, and tap OK to save the setting.
 The screen lock is set
If you fail to enter the correct PIN after five attempts, you will be prompted to wait for 30

seconds before you can try again.
Settings
> Settings > Lock Screen
366