How to Watermark Confidential PDF Documents (Step-by-Step)

## Protecting Legal and Financial Documents Watermarks are the first line of defense when sharing draft proposals, proprietary code designs, or financial audits. ### Best Practices for Watermarking: 1. **Use Diagonal Text**: Diagonal stamping across the page makes it impossible to crop out watermark disclaimers. 2. **Optimal Opacity**: Set opacity between 20% and 35% so underlying text remains readable while copyright ownership is unmistakable. 3. **Use Standard Disclaimers**: Use keywords like `CONFIDENTIAL`, `DRAFT`, or `INTERNAL USE ONLY`.