Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms.... Example 1 - add a text watermark to a presentation...0/slides/MyPresentation.pptx/watermark?text=this%20%is%20%a%20%watermark&fontHeight=18...