Stamp text across every page, with control over angle and opacity.
A watermark says something about the document that the document itself does not: that it is a draft, that it should not be circulated, that a copy came from you. It is a signal to a reader rather than a security control.
Getting it right is a balance. Too faint and nobody registers it; too strong and the document becomes hard to read. Around twenty percent opacity at forty-five degrees is the usual sweet spot, and you can change it here and check the result.
Yes. It is drawn onto the page and anyone with a proper PDF editor can take it off. Treat it as a label, not protection.
Around twenty percent — visible on every page without competing with the text underneath. Go higher only if the document is dense and the mark is getting lost.
Not yet — text only for now. An image watermark is on the list.
Yes, every page gets the same mark in the same place.
Combine PDFs in any order you like.
Break one PDF into many, or take a range.
Delete the pages you don't need.
Keep only the pages you pick.
Rearrange, rotate and drop pages.
Turn pages the right way up.
Make an oversized PDF fit.
Photos and scans into one PDF.