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....pptx" , SaveFormat . Pptx ); } Method IPresentation.... Save ( "output.pptx" , SaveFormat . Pptx ); } Property ISmartArt...