But the combination `<Primary>Super_L/R` can be set but does not work, nor does it do anything in the desktop, but maybe its still being stolen by it.
I guess so, it seems reasonable that the WM eats this combination and so it seems to not work.
But `<primary><super>a` can be set and works.
But the OP is getting `<primary><super>` which is two modifiers, @philiprbrenan @eht16 whats your Geany and GTK and OS and desktop version information?
That's true. No idea what's the difference. I'm using Xfce 4.16 with ´´´ 23:32:49: Geany INFO : Geany 1.38 (git >= b524a58e), en_US.utf8 23:32:49: Geany INFO : GTK 3.24.29, GLib 2.68.2 23:32:49: Geany INFO : OS: Arch Linux ´´´