Question - help with expression pedal to select and display any key (A,B C, G) for my SY1000 Harmonizer, Key to display on MC8

I am using my harmonizer feature on the SY1000 and loving it. I do need to change keys for different songs and set up a bunch of buttons for to toggle between A / B, C / D, E / F, G… I would like to replace that process with a rotary dial (on order) and just rotate keys. Importantly, I’d like that information to display on the controller so I know that I’ve selected C or G.

So… is it possible to assign Key A to Expression range 0-10, Key B to range 11 - 20, etc and display the Key on the Morningstar?