Perhaps you are referring to creating chords?
Place a note, then move the cursor up or down to the next note and place it with a <Ctrl-Enter>
See below:-
Top staff:
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble
|Key|Signature:F#
|TimeSig|Signature:4/4
|RestChord|Dur:4th|Opts:Stem=Down,ArticulationsOnStem,VertOffset=-2000|Dur2:Whole|Pos2:5
|Rest|Dur:8th|Opts:VertOffset=-2000
|Note|Dur:8th|Pos:-5
|Note|Dur:4th|Pos:-2
|Note|Dur:4th|Pos:0
|Bar
!NoteWorthyComposerClip-End
Bottom staff:
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Bass
|Key|Signature:F#
|TimeSig|Signature:4/4
|RestChord|Dur:8th|Opts:Stem=Up,ArticulationsOnStem|Dur2:Whole|Pos2:-4
|Note|Dur:8th|Pos:4|Opts:Stem=Up
|Note|Dur:8th|Pos:5|Opts:Stem=Up
|Rest|Dur:8th|Opts:Stem=Up,VertOffset=-2000
|Rest|Dur:Half|Opts:Stem=Up,VertOffset=-2000
|Bar
!NoteWorthyComposerClip-End