Futaba 8FG Super Mode changing question

[AGM]

I recently got a mode 2 Futaba 8FG Super Transmitter. Would like to change it to mode 1 but I cant seem to get a good guide online. Is it easy to change for this model? Or should I send to some place(maybe Sing hobby?) to have it changed?

Appreciate if anyone can help me out with some advises. Thanks!

[AGM]

FYI Singa hobby charges S$15 for the service.
Couldn't find a guide online, had to open it up and figure out how it works first and change it on my own. Not very difficult. Will advise others to do it on their own.