When editing a long score, it's useful to have visual reference points so you know which bar corresponds to the beginning of each page in the original hard copy score.
Using back-to-back section open/section close bar lines in a contrasting colour is one way, as in this example (imagine many bars full of notes on each page of a long page score, instead of these rests):
!NoteWorthyComposerClip(2.0,Single)
|Bar
|Bar|Style:SectionClose|Color:7
|Bar|Style:SectionOpen|Color:7
|Rest|Dur:Whole
|Bar
|Rest|Dur:Whole
|Bar
|Bar|Style:SectionClose|Color:7
|Bar|Style:SectionOpen|Color:7
!NoteWorthyComposerClip-End