# Add an image watermark to a PDF
Stamp an image across the pages of a PDF, in a Zap. Connect the PDF Blocks app once: no code, and no document is stored after the Zap runs.
Use this action to add an image watermark to a PDF document. You can
customize the watermark's transparency and margin.
## Input
<ParamField name="PDF Document" type="file" required>
The content of the input PDF document.
</ParamField>
<ParamField name="Transparency" type="integer number" default="50">
The transparency of the watermark, from 0 to 100. A value of 0 is
opaque and 100 is fully transparent.
</ParamField>
<ParamField name="Margin" type="number" default="1.0">
The distance, in inches, from the page border to the watermark. Must be
a positive number; decimals are allowed.
</ParamField>
## Output
<ParamField name="File" type="file">
A file with the watermarked PDF document. You can use it as input to
other steps in your zap.
</ParamField>
Add an image watermark to a PDF
Stamp an image across the pages of a PDF, in a Zap. Connect the PDF Blocks app once: no code, and no document is stored after the Zap runs.
Use this action to add an image watermark to a PDF document. You can customize the watermark’s transparency and margin.
Input
PDF DocumentfilerequiredThe content of the input PDF document.
Transparencyinteger numberdefault:50The transparency of the watermark, from 0 to 100. A value of 0 is opaque and 100 is fully transparent.
Marginnumberdefault:1.0The distance, in inches, from the page border to the watermark. Must be a positive number; decimals are allowed.
Output
FilefileA file with the watermarked PDF document. You can use it as input to other steps in your zap.