Adding watermark to a particular slide Using GroupDocs.Watermark, you can add watermark to a particular slide of a PowerPoint presentation in a simplified way. Adding watermark to a particular PowerPoint slide using GroupDocs.Watermark consists of following steps.
Load the document Create and initialize watermark object Set watermark properties Call setSlideIndex() of PresentationWatermarkSlideOptions Add watermark to the document Save the document Following code shows how to add TextWatermark to the first slide and ImageWatermark to the second slide.... Ex: "C:\\Docs\\presentation.pptx" Watermarker...relative path to your document. Ex: "C:\\Docs\\presentation.pptx" Watermarker...