Grbl config.h

Hey,

I want to change my config.h but how do i do that? Do i need to download it from my atmega328? Or find it onine and upload? Hopefully you can help! thx already.

It is not in your chip, rather it is on your PC. From the name, it sounds like is used when the code is compiled. Do you know how to compile the code ?

See here: Compiling Grbl · gnea/grbl Wiki · GitHub