@edithmair1 In Scribus, changes to the margins on master pages typically don't automatically update the margins on existing pages in the document. This behavior occurs because the margins for individual pages are set when they are created and are not dynamically linked to the master page settings.

To update the margins across all pages without changing them

Go to "File" > "Document Setup" > "Margins."

Adjust the margins there, which will affect all pages unless they have custom settings.