I can change the column with in the gridDesktop
Well, I tested your scenario and it works fine. The column widths you set in GridDesktop is exported almost fine when you use, e.g
Please try our latest version Aspose.Cells.GridDesktop v126.96.36.1990 from the Aspose.Cells package:
If you still find any issue, kindly do create a simple project, zip it and post it here to show the issue, we will check it soon.
Thanks, that is working ok now.