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Watermark PDF
Stamp text such as CONFIDENTIAL or DRAFT on every or selected page: centred, in a corner, or tiled.
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Watermark text, e.g. CONFIDENTIAL
Where to place it; tile repeats it across the page
More options (7)
Password of a protected PDF (open password, or owner password to lift restrictions)
Hex colour, e.g. #C00000
Degrees anticlockwise (center and tile only)
under: behind the content (hidden by opaque images)
Pages to stamp, e.g. all, 2-, odd