There are multiple options on every ticket like create, edit and delete. By this add on, You can get more options like Print Ticket, Lock ticket, Make Ticket in progress and change ticket priority.
Admin may have more power on any ticket to having more options like Lock ticket, make ticket in progress, take print of the ticket and can change the priority of the ticket.
Make ticket in progress when a ticket has opened by an agent.
Admin can lock any of the ticket however none of the action can happen on the ticket.
Admin can take the print of the ticket.
Here is the detailed version history below