NoteWorthy now supports this. Vertical placement departs somewhat from what major publishers use. Placement using text has also been improved. Here is a measure of each for comparison:!NoteWorthyComposerClip(2.5,Single)
|Note|Dur:4th,Staccato,Tenuto|Pos:0
|Note|Dur:4th,Staccato,Tenuto|Pos:1
|Note|Dur:4th,Staccato,Tenuto|Pos:2
|Bar
|Text|Text:"C"|Font:StaffSymbols|Pos:5|Justify:Center|Placement:AtNextNote
|Text|Text:"z"|Font:StaffSymbols|Pos:3|Justify:Center|Placement:AtNextNote
|Note|Dur:4th|Pos:0
|Text|Text:"C"|Font:StaffSymbols|Pos:5|Justify:Center|Placement:AtNextNote
|Text|Text:"z"|Font:StaffSymbols|Pos:3|Justify:Center|Placement:AtNextNote
|Note|Dur:4th|Pos:1
|Text|Text:"C"|Font:StaffSymbols|Pos:6|Justify:Center|Placement:AtNextNote
|Text|Text:"z"|Font:StaffSymbols|Pos:5|Justify:Center|Placement:AtNextNote
|Note|Dur:4th|Pos:2
|Bar
!NoteWorthyComposerClip-End