Simply run xev, press the desired key, and get the key code from there.
- replace one Mod4 with "Fn" key on key... stardiviner
- Re: replace one Mod4 with "Fn" k... Julien Danjou
- Re: replace one Mod4 with "Fn&quo... Vitor Eiji Justus Sakaguti
- Re: replace one Mod4 with "Fn... Julien Danjou
- Re: replace one Mod4 with &quo... stardiviner
- Re: replace one Mod4 with... Vitor Eiji Justus Sakaguti
- Re: replace one Mod4 with... Dmitry Lavnikevich
- Re: replace one Mod4 ... stardiviner
- Re: replace one M... Dmitry Lavnikevich
- Re: replace one Mod4 with "Fn... stardiviner
- Re: replace one Mod4 with &quo... Brandon Betances
- Re: replace one Mod4 with "Fn" k... Alexander Yakushev