User can create a report using the Data Report Designer. However, after saving, closing and re-opening, user cannot return to the design template to make changes to either the underlying query or the report layout
1) From the main menu, select Tools | Customize and enable the Report Viewer Toolbar.
2) In the Report Viewer Toolbar, there will be a "Design Report" button (hover over the button to see the button description as a tooltip.)
3) Click on the "Design Report" button and you will be brought back to Design mode for the report.