Yes! On the EZ Tally homepage select "Edit My School.

Select the “Courses” tab.

Click on the pencil button to edit the course.

Enter the number of laps per mile and hit enter.  

Changing the lap size will recalculate all laps that have been scanned on that course. 

Note: Scan delay is the time between each scan for a specific student.  This prevents double scans.