Editing a definition in the repository Follow these steps to modify definitions using Flat File Definition tool. Right-click the flat file definition in the Mapping Explorer view pane. You can also double-click the flat file definition in the Mapping Explorer view pane Select Open Flat File Definition. Make any changes to the flat file definition metadata. Click the Save button or press Ctrl + S to save the flat file definition modified in the editor. Right-click in the definition tree area, and click Save to Server. Select the appropriate server. Click Finish.