Jenny,1. Enter ALL the music.
2. Switch to Page View, if you are not already there.
3. Switch to Page Layout Tool.
4. Page Layout menu > Optimize Staff Systems...
5. Make your settings in the Optimize Staves dialog box, and click OK.
The empty staff systems will now be hidden in Page View. You can still see them in Scroll View.
It is important that ALL the music is entered before you optimize. If you after an optimization go to Scroll View and enter music in the empty staff systems, you will not see the new music in Page View.
Until you remove optimization again.
Peter