In SAS Enterprise Guide, you see a lot of data tables displayed in Data Grids, but Data Grids aren’t just for looking at data. If you need to add new rows or columns, fix errors, or update values, you can do that in a Data Grid, too.
When you edit a SAS data table in a Data Grid, any changes you make are permanent, even if you don’t save the project. So, unless you are absolutely sure about the changes you make, you should make a copy of the data table before editing. To make a copy, right-click the data icon in the Project Explorer or Project Designer window and select Export