Earl
You can do almost anything on these arrangers if you take the time but it normally involves some off line advance work and storage like in a registration. That contrasts with those of us who grew up with instruments where changes were more designed to be ‘on the fly’, like your organ. That is one of the trade offs with arrangers, you can do so much more, but you need to be prepared to work at it in advance.
I am impressed by the work some people on the forum do to prepare for gigs - edited styles, full banks of song specific registrations for a whole gig, play lists tied in to lead sheets on Laptops, etc. I played many gigs in my playing life where I had only met the other band members for the first time when we turned up and preparation consisted of - ‘Moon River,, Bb’ about 2 seconds before we started playing it. Sometimes not even that much info!
Mike