@codebrainz @elextr Yes indeed filtering will do, and it's probably better than having the entire list sorted: if the list starts with say monospace fonts, one will have to scroll alot till gets to the proportional ones. Whether it's specifically [combobox ](https://developer.gnome.org/gtk3/stable/GtkComboBox.html) to select one of the 3 options ( mono., prop., both), or just 2 [checkbuttons](https://developer.gnome.org/gtk3/stable/GtkCheckButton.html) to select one or both of (mono. , prop.) -- both do the job.
It's just a little convenient feature; I can only speak for myself, and I seldom need to pick fonts, but when I do it's tedious to scroll such a long list. It's the same "problem" in any other editor I remember, so it's not something to blame Geany at all. Perhaps if one editor does it, then others will follow too :) But by all means, I'm not trying to distract you from more serious problems.