There are several ways to lock the iPad or the form you are using:
1. FaceID – Authenticates access to the use of your iPad or iPhone device.
2. TouchID – Authenticates access to the use of your iPad or iPhone device.
3. Require Passcode – Determines how much time elapses before your device becomes locked.
4. Signature Lock – Locks the signature field on the form and prevents it from being modified.
5. Record Lock – Locks the form from being further modified.