How to Watermark a PDF with Text or Stamps
Whether distributing preview manuscripts or safeguarding proprietary trade secrets, watermarking clearly signals document confidentiality.
Diagonal vs. Tiled Watermarks
Diagonal Center: A large semi-transparent stamp (e.g. 45-degree angle) spanning the center of every page.
Tiled Repeating Grid: A repeating matrix of subtle markings across the entire background, making unauthorized redaction difficult.
Opacity Control
Setting opacity between 15% and 25% ensures the watermark remains clearly visible to readers while keeping the text underneath completely legible.
Summary
Client-side watermarking embeds text layers directly into the PDF content stream without exposing confidential files to online servers.
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