Maybe add ```filetypes.Scheme.conf``` to page [https://wiki.geany.org/config/start%5D(https://wiki.geany.org/config/start)? [filetypes.Scheme.conf](https://pastebin.com/1jDKBjZ5) and ```filetype_extensions.conf```: ```ini [Extensions] ... Scheme=*.scm;*.ss; ...
[Groups] ... Script=Scheme; ```
P.S. I know about PR [#1922 Add parsers and built-in filetypes for Lisp dialects](https://github.com/geany/geany/pull/1922), but I don't know what will be done (and when).