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....setFirstPageNumber ( 2 ); // Save the workbook workbook . save ( path . join...OverThenDown ); // Save the workbook workbook . save ( path . join...