# Add a Watermark to PowerPoint Files on Windows, Linux, and macOS

> APIs for adding text and image watermarks to PPT, PPTX, and ODP presentations.

Source: https://products.aspose.com/slides/watermark/
Updated: 2026-07-30



### [Aspose.Slides for .NET](/slides/net/watermark/)

How to add watermarks to presentations with C#.

### [Aspose.Slides for Java](/slides/java/watermark/)

How to add watermarks to presentations with Java.

### [Aspose.Slides for C++](/slides/cpp/watermark/)

How to add watermarks to presentations with C++.

### [Aspose.Slides for Python via .NET](/slides/python-net/watermark/)

How to add watermarks to presentations with Python via .NET.

## FAQ

### Can a watermark be added to every slide at once?

Yes. Adding it to the slide master applies it across the deck, rather than repeating the shape on each slide.

### Can a watermark be removed again?

If it was added as a shape, yes — find the shape and delete it. That also means a watermark added this way is not a security control; it marks a document, it does not protect it.

### Can I use an image rather than text?

Yes. Both text and image watermarks are supported, with control over position, size, rotation and transparency.

### Does a watermark survive conversion to PDF?

Yes. It is a shape on the slide, so it renders into the PDF like any other content.