BUTTON SWITCH MODULE - How to add 2 remote controller to 1st channel?

[admin]

every remoter have different address, just let your yellow receiver module to learn which remoter is ok. here is a video details how to do:
https://youtu.be/4_YDX3bGI64
if you want two remoter all learn by first (left ) yellow receiver module, you can just learn again from second remoter is ok . (note: not to do clear code step! )