I while ago I transposed the PX5S for a particular song. Somehow the PX5S kept this transpose permanent. Now I need to re-program the transpose setting everytime I switch the instrument on. I have no clue how to change this and I don't know what I did that it kept the sys setting permanent. Can't find anything in the manual. So how are SYS SETTINGs made permanent and non-permanent? Any advise would be greatly appreciated. Thank you! Tom