I think my need must be fairly common - to assemble a legal appendix. In this case all components are PDF format.
I know I can manage PDF documents in a master document, but I couldn’t get any further, so here I am.
PDFs should appear as the originals did - not reduced to make room for more borders and headers and footers.
Page numbers should overwrite the PDFs at top center, boxed, in format “A###”, where ### is the page number.
If I can do those two things in Writer, then I will try the next step - to add a title page and index. Advance suggestions to use an automatic TOC are welcome - like, can I put my index entries in headers, different header per PDF document?