In this step-by-step tutorial, we will elaborate on how to insert draft watermark in PPTX using Python without any dependence on MS PowerPoint. You can use this application to add draft watermark in PowerPoint using Python in any .NET Core and Python supported environments inside Windows, Linux or macOS.

Steps to add confidential watermark to PowerPoint in Python

1. Set up the environment to install Aspose.Slides for Python via .NET for inserting watermark text in the presentation
2. Create a new or load an existing presentation to insert a watermark using the Presentation class object
3. Iterate through the presentation Master Slide/s inside the presentation
4. Add an autoshape with a confidential watermark text for every slide inside the master slides collection
5. Format the shape and textual properties and apply locking on the shape to protect the watermark
6. Save the watermarked presentation on the disk

By following the aforementioned steps, you can insert a confidential watermark inside PPTX using Python, whereby the process commences by loading an existing or creating a new presentation using an instance of the Presentation class. Then, you will iterate through every slide inside the master slide collection and add a draft watermark text shape inside it. Finally, you will protect the shape with different locks exposed by auto_shape_lock class instance and save the watermarked presentation on the disk.

Code to Add Draft Watermark in PowerPoint using Python without Interop

This example can also be used for the PPT and ODP presentation formats to add confidential watermark to PowerPoint in Python with the help of simple API calls. The shape locking feature is a unique feature offered by the API, which is not available in MS PowerPoint. You can protect the intellectual property rights of your presentation by implementing the locking feature to protect the watermark shape and disallow anyone to modify or remove it even inside the PowerPoint.

In this topic, we have learnt to add draft watermark to PowerPoint in Python and protect the presentation. If you are interested in learning about adding HTML content inside the presentation, refer to the article on how to insert HTML into PowerPoint using Python.