For a terminal on the floor that nobody should be able to leave: On · full screen, locked takes the whole screen with no window frame, stays on top, and the app cannot be closed or minimised. It stays that way after a restart.
Only a manager can turn it off, from the same place, because ⚙ needs the manager PIN to reach this card. A developer's window stays a window: kiosk is off until someone turns it on.
Related: Auto log-out · A kitchen, bar, expo or board device