Let's say you closed an event for public registration because the registration deadline passed. But then a last-minute registration request came through, or one of your existing registrants wanted to add another attendee. To do so, you had to change the event settings, create the registration, and then reinstate the registration settings.
Well, we want to save you a few steps! Starting now, admins can register people on closed events. Just use the New Registration and Add Attendee buttons like you would on an open event.