I found a feww demos on youtube that were sort of helpful.
When I got my Korg AX3000 I asked Korg to let me know if there were any demos but they as you can expect never got back to me.
The best advice is obviously to read the manual and I do emphasise this point AFTER you have had a play around with the pedal first.
By that time you will have a bit of an idea how it is working.
Besides it is more fun if you don't know how it works to start with. Hey!?????????
ciao
Bronwyn