The Windows way to set up scaling is to use winsetup.exe, but there doesn't seem to be any equivalence in the Linux build.

Is there a way to manually craft an agssetup.cfg to get larger scaling on Linux systems?

I have a large-ish screen and the window is just *too* small. I tried some naïve "game_scale_win=4" entries but to no effect.

The obvious would be fullscreen. Of course that's not windowed. Seems to be using an older AGS build. Changing gfxfilter value to "gfxfilter=StdScale4" worked. Terminal also worked with: Presumably you could run it in a new AGS build, but I didn't try that.