Consult the manual? If you bought used and they didn’t come with the program guide, I would go onto hobbywing direct.com/ or hobbywing North America and see if you can get a digital version. With out the guide, I never remember how to program mine let alone calibrate for neutral forward and reverse.
How is your set up?? I have an old Team Associated RC10 I plan to resurrect. Just wondered the power of motor and esc combo that you have and if you like it or not.