Layer:
!NoteWorthyComposerClip(2.0,Single)
|Rest|Dur:Whole
|Bar|SysBreak:Y
|Rest|Dur:Whole
|Bar
|Rest|Dur:Whole
!NoteWorthyComposerClip-End
with:!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble
|Key|Signature:Bb,Eb,Ab
|TimeSig|Signature:Common
|Rest|Dur:Whole
|Bar
|Rest|Dur:Whole
|Bar
|Rest|Dur:Whole
!NoteWorthyComposerClip-End
Whole Measure Rests align in the editor, but not in Print Preview.
Workaround is to add invisible barlines:!NoteWorthyComposerClip(2.0,Single)
|Bar|Visibility:Never
|Rest|Dur:Whole
|Bar|SysBreak:Y
|Bar|Visibility:Never
|Rest|Dur:Whole
|Bar
|Rest|Dur:Whole
!NoteWorthyComposerClip-End
!NoteWorthyComposerClip(2.0,Single)
|Clef|Type:Treble
|Key|Signature:Bb,Eb,Ab
|Bar|Visibility:Never
|TimeSig|Signature:Common
|Rest|Dur:Whole
|Bar
|Bar|Visibility:Never
|Rest|Dur:Whole
|Bar
|Rest|Dur:Whole
!NoteWorthyComposerClip-End
IMO, Whole Measure Rests must align in any given bar across the entire system regardless of signature contents/visibility.