A CONFIDENTIAL watermark signals handling rules and deters casual leaks. GekiPDF stamps it diagonally across every page at 18% opacity by default, so content stays readable.
Watermarks are merged into page content, so they cannot be switched off in the reader's UI.
Frequently asked questions
Can I change the opacity?
Yes — 0.05 is very subtle, 1.0 is solid.
Can I use a different word?
Any text up to 60 characters: DRAFT, INTERNAL, your company name.
Does the watermark survive printing?
Yes, it is part of the page.
Do it in the full tool
Open Watermark PDF for all options, or jump straight to another step below.