Before Recording the Custom Control Assign the Aux Bus to the Panel Row. To do this in the ME that you want the Control of the Key Bus to be delegated press the ME SEL Button. This button is on the Right Most XPT Module next to the Display that shows you the ME and the Keyer Priority/Assignment settings.
Now in the Display you can pick the Aux Bus using the menu system to select the Aux Bank and Aux Bus.
Now that you have the panel ready -- Start your custom control (or insert via the edit menu in an already recorded macro at the point you want the bus selection made). Now that your recording just select the XPT that you would like to switch to on the Aux. Now finish recording.
if you look in your CC via the Edit menu you will see that the AUX XPT select has been added/inserted in the Custom Control.
Les
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