Ubuntu Manpages

proton-call [OPTIONS]... EXE [EXTRA]...

Path to a directory containing Proton to use
View this help message
View an index of installed Proton versions
Pass PROTON_LOG variable to Proton

-o, --options [OPTIONS] Pass options to Runtime

Use Proton VERSION from `common`
Run EXE in proton

-R, --runtime [VERSION] Use runtime VERSION

View version information

The config file should be located at '$XDG_CONFIG_HOME/proton.conf' or '$HOME/.config/proton.conf' The config requires two values. Data: a location to any directory to contain Proton's runtime files. Steam: the directory to where steam is installed (the one which contains the steamapps directory). Common: the directory to where your proton versions are stored, usually Steam's steamapps/common directory. Example:
data = "/home/avery/Documents/Proton/env/" steam = "/home/avery/.steam/steam/" common = "/home/avery/.steam/steam/steamapps/common/"

The full documentation for Proton is maintained as a Texinfo manual. If the info and Proton programs are properly installed at your site, the command

info Proton

should give you access to the complete manual.