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, rows are defined as $1:$2 and columns are defined as $A:$B...1 & 2 as title rows pageSetup . setPrintTitleRows ( "$1:$2" );...