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....} presentation -> Save ( u "Resize.pptx" , Export :: SaveFormat...presentation -> Save ( u "D: \\ Resize.pptx" , Export :: SaveFormat...