Pekoo

Yes, I understand that. But what do I do if I want to change the type area afterwards? Do I have to change each page individually? Perhaps for explanation: I would like to use the Publisher for the layout of a book. I would therefore like to see the following: Each document is assigned a template that only defines very general things like the page size, standard font, etc. Each document is divided into several (at least one) sections (in my case title and text), which in turn contain the individual pages. Each section is assigned a template (master page), which then defines the type area, numbering, and so on. I can also create individual text frames there (for the title page without text flow - for the text with text flow and numbering). The individual pages inherit the template of the section, but can also change this template (e.g. to prevent numbering for the last page) or replace it with other templates. Advantage: Within a section I can easily add pages, which then automatically adopt the templates (including the text frames). In addition, to change the type area, I would only have to change the template of the section. Would that be a good idea? Translated with www.DeepL.com/Translator

Short question: How do I change the type area (margins) for the entire document with this type of page creation? Without a connection to the master pages this seems hardly possible to me.

Thank you very much for your help. Now I get it. Perhaps it would be helpful if this function could also be accessed via a right click.

When I try your proposal, the text will not overflow any longer, but no new pages will be created. I will try this later again with a new document.

For the layout of a book I created two master pages: one for the title pages and one for the content. In Scribus (that I have used so far) you can create multiple connected text frames at once. Unfortunately I can't find a way to achieve this with Affinity Publisher as well. Did I miss something?