How to change the smart island face unlock?

The way to unlock the smart island face and turn it into a square is:

1, which is the setting function of opening Apple's mobile phone.

2. Find the face ID and password in the setting function.

3. Click to reset the avatar ID, and click to enter to have unlocked personality.

4. Click to use the box to unlock. Two faces can be set on the same Apple phone, and users can choose face recognition with or without a mask.