Changig music frame in master pages does not have any effect

I have editet the first page of my master pages and shifted the upper margin of the music frame downwards to get some space for an additional text frame. But when I close the master-pages editor the changes do not apply. This is independent of the setting of the constraints of the music frame. Can somebody please help me?

Have you changed right and left masterpage? You can copy the layout via buttons form left to right and vice versa.

That was it. Thank you very much!

You’re welcome :blush: