In addition to code folding, it would be convenient to folding comments
Folding on multi-line comments on C/C++ works for me with recent git version.
No version of Geany or language being edited is specified. If comment folding is not available for a particular edited language the functionality needs to be a feature request to the editing component that we use, Scintilla (it is a separate project www.scintilla.org).
Comments for this bug:
add this "fold.hypertext.comment=1" under [lexer_properties] in the filetypes.php file (save it from the system-wide directory to ~/.config/geany/filedefs/filetypes.php)
whether it is possible to make an option in settings?