Control Panel VKEY 100 / external keyboard -OUTPUT: SELECT PROGRAM
With this feature you can choose what is to be visible on the Program screen after pressing a function key. Select a source from the drop-down list in the Output Media field. This function operates on the upper line (Bus) of the video mixer’s PRG (Program) buttons. The active button is backlit in red. When you press a key with Output: Select Program function assigned, a button with the selected source will light up red.