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.... freezePanes ( 0 , 2 , 0 , 2 ); // Freezing Columns worksheet2...worksheet2 . freezePanes ( 2 , 0 , 2 , 0 ); // Freezing Rows Apache...