About PDF tools
The PDF tools handle the jobs that come up most: combining several PDFs into one, splitting one apart, deleting or rotating pages, making a PDF smaller, adding page numbers or a watermark, adding or removing a password, turning photos into a PDF, and getting page images or text back out of a PDF.
When you merge, split, rotate or delete, pages are copied exactly as they are, so text stays selectable and images and fonts are unchanged. Compressing only shrinks the photos and scans inside a PDF, and page numbers and watermarks are drawn on top of the existing pages.