1. On the Racing screen, click on the button next to the race group name and select "Test / Tiebreak".  That will display a generic set of racers on the screen.
  2. Put the racer in the appropriate lane.
  3. Run the heat, just like any other heat.
  4. Write down the time, as times are not saved when in this mode.
  5. Go back to the original heat.
  6. Click on the Manual Results button to edit the times for that heat.
  7. Click on the Save button to save your changes.

 

See also the Partial Heat Rerun video on GrandPrix Race Manager's Video page, http://grandprix-software-central.com/gprm/videos.php.