Here's the manual (for starters).
The button to the far right chooses the input. If the TV is selected, push one of the two small buttons on the upper left above the row of buttons, that is the A and B set of speakers (marked ZONE but in Little tiny letters). The A speakers are the ones in the ceiling and the B speakers are the ones that will irritate the neighbors if you have them on at night (outside). I took my B speakers and ran them to some small BOSE bookshelf speakers since I don't use them at all outside.
By the way, welcome to the forum and hello from Nicholls!