Not "basic" at all. NWC does not allow much editing of chords containing rests. Usually you have to re-create them from scratch.
If you are trying to turn something like measure 1 into measure 2 or 3, try this link: RestChords - hiding the rest
!NoteWorthyComposerClip(2.0,Single)
|Chord|Dur:4th|Pos:-1|Opts:Stem=Down|Dur2:4th,Dotted|Pos2:1
|RestChord|Dur:8th|Opts:Stem=Up|Dur2:4th|Pos2:-2
|Note|Dur:8th|Pos:0|Opts:Stem=Up
|Chord|Dur:Half|Pos:-3,-1
|Bar
|Chord|Dur:4th|Pos:-1|Opts:Stem=Down|Dur2:4th,Dotted|Pos2:1
|RestChord|Dur:8th|Opts:Stem=Up,VertOffset=2000|Dur2:4th|Pos2:-2
|Note|Dur:8th|Pos:0|Opts:Stem=Up
|Chord|Dur:Half|Pos:-3,-1
|Bar
|Chord|Dur:4th|Pos:-1|Opts:Stem=Down|Dur2:4th,Dotted|Pos2:1
|RestChord|Dur:8th|Opts:Stem=Up,VertOffset=2000|Dur2:4th|Pos2:-2
|RestChord|Dur:8th|Opts:Stem=Down,VertOffset=-2000|Dur2:8th|Pos2:0
|Chord|Dur:Half|Pos:-3,-1
|Bar
!NoteWorthyComposerClip-End