For designating any tickets you want to have available to sell at check-in.
Note: We recommend having at least one comp ticket available to sell during check-in as an easy way around problems with pre-purchased tickets and/or unexpected attendees. We also warn that there is no graceful way to enter guests on multiple seat tickets (more than 2 seats) when the tickets like Table tickets are mistakenly set for sale at checkin.
To review tickets available to sell at check in:
Go to: Admin > Site Settings > Ticket Sale > Ticket Types