Any suggestions for typical settings for different needs, such as when playing chords for vocal accompaniment, or when playing solo/lead melody?

I've experimented but with so many combinations I'm sure there are some that I haven't considered, and possibly not being the sharpest tool in the tech

world (the last technician I conferred with told me I had an I D ten T problem, I wasn't sure what the was?). Any setting suggestions would be appreciated.

Thanks

Dr. Z