We'll guide you how to insert draft watermark in PowerPoint presentation in <strong>C</strong># using simple API <strong>C</strong>alls. You may add <strong>C</strong>onfidential watermark in PowerPoint presentation by using easy API interfa<strong>C</strong>e in <strong>C</strong>#....Diagram Product Family Aspose.Tasks Product Family Aspose.OCR...in PowerPoint Presentation in C# In this step by step tutorial...