Where to find retroarch.cfg full documentation?

[corminos]

Does anyone know where I can find complete documentation on the full list of variables available in the retroarch.cfg and what they mean?

I know the file itself documents the inputs that are there, but I always seem to run across more variables as I search around on how to implement functions.

I found this link https://github.com/dowobeha/RetroPie.cfg/blob/master/opt/retropie/configs/all/retroarch/retroarch.cfg that has 1629 variable names (but over 1000 of them are for player2-player16 inputs), but I would like to understand what some of these options do.

For example, I'm trying to understand the difference between two input names that are the same except for "_btn" or "_axis" on the end.

Also, if there is any documentation on what the names for each of the keys, I would appreciate that. For example, I've seen the left ctrl button referred to as "L-ctrl" and "lctrl".

Thanks in advance.

[mitu]

You can check out the official commented .cfg from https://github.com/libretro/RetroArch/blob/master/retroarch.cfg, but apart from that I don't know if there's any official reference with all the options. The aforementioned configuration file has a pretty good explanations for the input handling.