That is currently not possible.But Jared, one of the developers, mentioned that it will may included in future versions of osticket. Not much info, but usually if the developers have it on their list it will be added somewhen. So I guess you'll have to be patient or modify your osTicket version yourself.See Jareds comment here: https://github.com/osTicket/osTicket-1.8/pull/1329