From a Korg Tutorial:

"How to save an STS: choose the Page Menu (TAB right top)-> Write Single Touch Setting option".

This is what I understand from working with my Pa800:

1- I see the four STS settings on the screen. Now before saving I want to change them (not save them yet) Example: Change STS 1 Trumpet to Piano.

2-If I taped on the single instrument at the top right I was able change the instrument.

3-If I selected a performance, I then could write it into one of the STS settings. The tab above showed: Save Performance, and below that: Save One-Touch-Setting. I can see the "Save One-Touch-Setting" but it is not highlighted and can not be used.

Problem:
1-Neither #2 or #3 steps change the STS in the window. I cannot find a way to change the STS setting in the window. I am not talking about saving here, just changing.

Am I missing a simple step?
OK, confused.
John C.