Desktop vs Mobile sizing

Hey Ben;

I’ve set the event settings to use Posterboard for Desktop and Agenda for Mobile, and noticed tablets both mini and regular fall into the mobile category. Assuming you guys don’t come up with a third tablet choice in settings, how can I manage this so posterboard comes up on normal sized iPads tablets?

http://www.getmyhallpass.com

Thanks

https://wordpress.org/plugins/all-in-one-event-calendar/