Hi Model T,
in NWC there's an option for entering Triplets, but for Duplets you have to create them manually. You can use hidden rests for that and then use my User Object "TupletMarks.fso", or in case that you enter beamed eighth notes you can also insert a text line with "2" on the Duplet (be careful with this... the correct print position of the text could be a little hard to find).
Take a look at this:
!NoteWorthyComposerClip(2.75,Single)
|Clef|Type:Treble
|TimeSig|Signature:4/4
|Note|Dur:4th|Pos:-2
|Note|Dur:4th|Pos:-2
|Note|Dur:4th|Pos:-2
|Note|Dur:4th|Pos:-2
|Bar
|User|TupletMarks.fso|Pos:7|number:2
|Note|Dur:4th|Pos:-2
|Rest|Dur:8th|Visibility:Never
|Note|Dur:4th|Pos:-2
|Rest|Dur:8th|Visibility:Never
|Note|Dur:4th|Pos:-2
|Bar|Style:Double
|TimeSig|Signature:6/8
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=End
|Bar
|Text|Text:" 2"|Font:StaffItalic|Scale:85|Pos:-8.5|Placement:AtNextNote
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=First
|Spacer|Width:100
|Rest|Dur:16th|Opts:VertOffset=2|Visibility:Never
|Spacer|Width:100
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=End
|Rest|Dur:16th|Opts:VertOffset=2|Visibility:Never
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam
|Note|Dur:8th|Pos:1|Opts:Stem=Down,Beam=End
!NoteWorthyComposerClip-End
Of course I'm sure there's lots of other "secret ways" to do it...
I hope it helps ^__^
Lloyd.