Using keyboard button 1, how to use 1 in vehicle?

Im using my keypoad 1 that has always been where my macros is for gse.
I saw something about keybinding and overiding so the 1 button will still work in vehicles or while dragonriding, But it was gibberish i couldnt understand. Im using Gaupanda BM . Is there anyone who could tell me what to do so i can still use button 1 for vehicle. Cant figure it out.

I had the same problem yesterday.