That seems like a really good idea. I will check into that. “Page background image” was not even in my consciousness until now. Thanks!
That Joe Workman Floaty Stack, (which I love and use a lot) is fine for this as long as I am OK with just a top slice where I can put a header (or an image or paragraph) and a bottom slice where I can only put text. What would be cool would be if it had more multiple-use slices, running down the page, if you wanted them. But it does not work that way.