MMR of 10 is split in 8 and 2 in Print Preview
In the attached song, in measures 38 to 47 there's only piano to be played. The score is only showing the voices parts, with one special staff 'ALL', wich is used when all voices have to sing unisono. So in all but the piano staff I have a MMR of 10 measures, where the voice staffs are collapsed, so only the 'ALL' show is to be shown.
The problem is : in Print Preview this creates a MMR of 8 in one system, followed by a MMr of 2 in the next system. What I want is 1 MMR of 10.
How can I do this?