Ok since it's so small, I'll explain.
From the left there are 5 buttons for the front tv, they are DVD,AUX1,ANT,AUX2,and CABLE
The next 4 are for the ext. TV and are DVD,AUX1,ANT,and CABLE.
The last 5 are for the rear TV and are the same as the front 5 buttons.
I would assume that you would play a DVD and push DVD for front and get DVD. Push ANT and get TV ststions. But you only get either ststions or DVD if you do a new search on the TV. otherwise you only get the sound throughout the coach for the button you select.