Sequence
Use thumbnails for structure, then use the final PDF for proof
Thumbnail order makes duplicate scans, reversed feeds, and misplaced appendices visible. Select groups carefully before rotate, duplicate, delete, extract, or reverse actions. A thumbnail can hide small text or a similar-looking repeated page, so compare page numbers, headings, signatures, and edge details rather than trusting appearance alone.
Insertion
Inserted PDFs, images, and blank pages need a deliberate size and location
Add a source at the start or end according to the packet, and choose a suitable size for blank pages. An inserted image may become an image-based page with different margins or resolution from the surrounding PDF. Check the boundary before and after every inserted item and confirm that the new page does not disrupt paired spreads or printed duplex order.
Feature safety
Page operations do not edit printed content and can affect document-level behavior
Rotation changes page orientation, not the words within a scan. Deleting a page is permanent in the exported copy, and extraction separates pages from the source context. Forms, bookmarks, links, attachments, and digital signatures can depend on the original structure. Keep the source and use a full editor when those relationships must be maintained.