If you have the series division set to 'Manual series division', it is possible that empty lanes will appear and sometimes even almost empty heats. This occurs, for example, when an athlete is removed from a heat. An empty lane/space then appears in the place where the athlete was assigned.
So if you change many athletes from the startgroup, you can create almost completely empty heats. You can remove the empty lanes yourself by moving your mouse over the lane and clicking on the red trash can icon.
This has been automatically translated into English