Cannot change hotkey in retroarch

Please check the link above,
I can reset and clear the hotkey, but cannot remapping the hotkey.
Does anyone know the solution?

Many thanks.

There’s a few solutions. I’ve covered some of them in this post: (you can search for things in future too! :))

Change the .cfg file on your pc and replace it

Yup. Hopefully, by following my steps above, you can save yourself the trouble of SSHing in every time you want to change your key bindings.

But if you do decide to manually do it via editing the cfg file as @yan has suggested, (that is located in the hidden .config/retroarch directory within the cpi home directory), you will need to know what each key on the keyboard corresponds to.

Here’s a post that has it laid out for you: