If you are the only user visiting and editing an item, Integrity provides no indication of concurrent users because only one user is editing the item. If a second user attempts to edit the same item, Integrity notifies the first user that they have locked the record.
If you are inactive for 60 seconds, the item is automatically unlocked for another user to edit. If you decide to discard your changes, you can click Release to unlock the item for editing by another user.