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...pageSetup . setPrintTitleRows ( "$1:$2" ); // Allowing to print gridlines...