Stamp text or a logo over your pages — DRAFT, CONFIDENTIAL, a company name, a date — with control over opacity so it marks the document without hiding it.
A watermark states something about every page at once: that a document is a draft, that it is confidential, that it belongs to a client, that it must not be circulated. It is a declaration, not a security measure — anyone determined enough can remove or cover it, so pair it with a password when the content truly must not leak.
A watermark at full strength makes a document unreadable and looks like a mistake. A light one reads as professional: visible enough to be noticed, transparent enough that the text underneath stays legible on screen and on paper. If a scan is already dark, keep it even lighter.
A single diagonal word across the page is the familiar choice. Tiling repeats the mark so partial screenshots still carry it — useful when the risk is someone cropping a corner of your document and posting that.
Yes — a logo or stamp image can be placed the same way as text.
Run the tool on the selection you need, or apply it to all pages when the mark applies to the whole document.
No. It is a visual declaration. Use the Protect tool for actual encryption.