Merge, split, rotate, and reorder PDF pages, add or remove a password you know, and turn photos into a PDF on your device.
Turn sideways or upside-down scanned pages, remove blank pages and fix the order. Why rotating doesn't redraw pages, and why bookmarks may not carry over.
Open vs permissions passwords, how to remove a PDF password you know before you submit a file, and how to lock your own PDF with an AES-256 open password.
A checklist for combining PDFs before you submit them: the recipient's file rules, password-protected files, what merging drops, page order and file names.
Combine phone photos of receipts and paperwork into one PDF, one photo per page: shooting tips, paper size, orientation, margins, HEIC and file size.
Save only the pages you need from a PDF as a new file. Choose one file or one per range, write ranges like 1-3, 5, 8-, and see how the results are named.