To edit a large portion of a flat file data object, you do not need to change every value in the Developer tool. Instead, you can copy the flat file columns to Excel, change all the values simultaneously using Auto Fill, and then
Paste (Replace)
the flat file back into the Developer tool.
To copy the metadata from the Developer tool, right-click within the flat file data object and click
Select All.
Copy the metadata to an Excel spreadsheet.
Make changes within the Excel spreadsheet.
Copy the metadata from Excel.
To update the flat file data object with the changes, right-click within the flat file columns and click