You can allow/disallow new flows to be shown on the same page as previous flows if there is space; for example, to reduce the number of pages required for parts in works with multiple movements. By default, new flows are allowed on the same page in part layouts and are not allowed in full score layouts.
Procedure
Result
Always start new page ensures flows in the selected layouts always begin at the start of the next page after the end of the previous flow.
Allow on existing page allows flows in the selected layouts to continue immediately after each other, including within the same music frame if there is sufficient space. Flow headings are automatically shown above the start of flows if you have chosen to show flow headings in the selected layouts.
Flows are not automatically split into separate music frames. You must insert frame breaks manually to divide flows into separate music frames if required.