In the Playing Techniques Glyph Editor (or Note Shape Editor, etc), the drop-down list of SmuFL glyphs is broken down into SMuFL categories, and listed alphabetically, but it can take a while (particularly in such a large list) to find exactly what you want.
Accidentals, for example, are under S for “Standard Accidentals”; but Ornaments are found under C for “Common Ornaments”. If the symbols you need aren’t in those sets, you have to try sets starting with O for “Other…”. In contrast, Fingering has extra glyphs in a set called “Fingering supplement”, which is usefully next to “Fingering”.
I suggested a while back that the Font Styles list suffered similarly, in that Lyric styles were spread about the alphabetic list, (C for Chorus Lyrics, but L for Lyric Translation.) Tempo styles have to be searched under I for Immediate and G for Gradual.
What I’d like to see is some kind of ‘hierarchical backwards description’, as favoured by Indexers and the Army:
Noteheads > Medieval & Renaissance
Noteheads > Shape Notes
Ornaments > Trills & Mordants > Combining strokes
I don’t pretend to understand all the Sagittal extension thingys, but essentially, they’re all types of Accidentals, so:
Accidentals > Sagittal extensions > Magrathean diacritics. (Isn’t Magrathea from Hitchhiker’s Guide?)
This would be a massive time-saver when searching, or even browsing, the lists.