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....Managing Rows & Columns Add/Insert/Remove Rows and Columns X X X Hide/Show...Rows and Columns X X Freeze/Unfreeze Rows & Columns X X X Customize...