Open the PowerPoint file containing the slide to which you want to add the watermark. Choose the slide that will get the watermark by clicking on its image in the PowerPoint user interface.

How to Add a New Slide to PowerPoint. Microsoft's PowerPoint application can be an invaluable tool for creating business presentations to pitch new clients or to use as a visual aid in meetings ...

Microsoft updates Copilot in PowerPoint to allow Windows users to create new slides from files or documents, and even give them prompts.