The steps below will cause the report to insert blank pages where necessary, so new groups print only on odd-numbered pages. The result will be that groups start printing on face pages when using the duplex printing functionality of the printer.
  1. Right click on the last Group Footer section on the report and select Insert Section Below (Group Footer a and Group Footer b will be created)
  2. Ensure that the Group Footer a section is not suppressed (the Group Footer b section may be suppressed if needed)
  3. Right click on the Group Footer a section and select Format Section or Section Expert
  4. On the Common tab, click X+2 beside the New Page Before line (do not mark the checkbox here)
  5. Enter this formula: PageNumber Mod 2 <> 0
  6. Click Save & Close
  7. Right click on the Group Footer b section and select Format Section or Section Expert
  8. On the Common tab, mark the New Page After and Reset Page Number After checkboxes
  9. Click OK