When I select ‘make into frame’, some pages retain the original frame layout, while others get merged into a single line. Why does this happen? How can I make sure the frames stay properly aligned?
k.k, it is crucial that you select two items - best two notes or two barlines. This will result in one fixed frame (where you “push” your content in) and will not affect other frames.
Actually all Frames will stay as they are - just you told Dorico, how to fill that specific one frame.