You go to the box office and they will show you a screen of seats too choose from:) if you go to the kiosk them you can choose right on the screen
When i get free movie tickets for AMC, i go to the box office and reserve my ticket with them a few hours in advance. If you want to get good seats I'd do that, if you don't care about where you sit, then just show up before your movie and select your seats then. So yeah, regardless if you gave free tickets or purchase them you'd still have to go and select your movie and reserve your seats
Seats are marked, and the A/z on the stairs for row assignment.
I would normally just get there early and get seats then or just by them online and when you there go up to the counter and try to get a refund using your free tickets. I would call to make sure they can do that
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