I have a choir piece that I have notated several pages as
4 part harmony on 4 staves. How can I add, move, staves to
show voices on One staff Div. into Sop1, Sop2, etc, into
two staves?
You cannot currently combine two NWC staves into a single printed staff. You can export them, and then import them into just two staves, but the results will not be what you are looking for, since each voice will be collapsed into single-stem chords.