It should be the case that content in the page will move down when the header in the Master has increased in size (or visa versa). Is it possible that a different master page was assigned to that page?
The correct master is applied, but I can't get it to work. Am I doing something wrong with the guides?
I have included screenshots that show how the master looks, how the page with the master looks, and what happens when I change the size of the master page.
Page with applied master
Content doesn't move when master page changes size
Please let me know what I'm doing wrong!
Try moving the blue header guide on the Master page below the content (below the menus). This should cause the child pages to adjust accordingly.