When the video image includes two or more arenas, by default the calibration is shared. This means that the calibration is used for all arenas.
When you need more accurate calibration, for example when the distance between individual arenas and the camera varies, you can calibrate each arena individually.
To make the default shared calibration unshared and calibrate individual arenas, in the Arenas and Zones section, right-click Calibration and select Unshare This Calibration.
Next, calibrate each arena. See Calibrate the arena.
In the Arenas and Zones section, right-click the calibration you want to share and select Share This Calibration.