I just have mine set to:

This is a local aux
For local people
There's nothing for you here

'Cos any unit I have feeding into it has its own display anyway.

Not sure what the icons around the screen mean on Aux mode, but that never really mattered. I just want Das Blinkenlichts to blink.
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock