# Calibrate multiple arenas

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 calibration unshared

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.

To make calibration shared

In the Arenas and Zones section, right-click the calibration you want to share and select Share This Calibration.