Korg PA.
Hold 'shift' and press almost any other control button ....instant access to those functions exact settings...the easiest OS to use I have seen.
Lots of folks either don't know about it or forget to use it.

One more thing while we are on the subject...get yourself a nice cup of tea (or ?), set down some night and actualy carefully read the manual!
(You would not believe the questions on the Korg forum from people that are too lazy to read the books). Actually STUDY the manuals.

Lee S.