How to set up the PX4 Flaperon

I am developing a v-tail airplane.
I am trying to use flaperon.

I saw this but I don’t know what you mean.
please tell me how to set it up

Good point, that documentation was missing. I will add it through add flap/spoiler confiugration docs by sfuhrer · Pull Request #2450 · PX4/PX4-user_guide · GitHub, please have a look and directly reply on the PR if something is unclear.