Flatbed scanners and phone scanner apps love producing one file per page. Anyone receiving fourteen separate attachments will not thank you.
Scanners name files in ways that sort oddly, so page 10 often lands before page 2. The list shows each file with its page count, which makes a misplaced page easy to spot before you merge rather than after.
If your pages arrived as images rather than PDFs, use the image to PDF tool instead. It does the same job starting from photos.
Merging does not touch the pages themselves. Text stays selectable, links keep working, and nothing is recompressed.
Convert the photos to a PDF first, then merge that with the rest.
None set by us. Your device memory is the only real limit.
No. Pages are copied across untouched.