This is psr2000. What is the best way to change RH voices while playing? This is coming up quite often where I'll want to switch from piano to electric guitar or whatever but I haven't figured out a way to do it fast. One can be Main and one can be Layer but I have to press Main off and Layer on if I do that? Am I missing something with that?

I thought I could load the right guitar under the Guitar voice button but if I do that, no, it pulls up the first guitar in the group if I press guitar (with Main... piano... playing).