# Organize the zones in your arena

Zone groups

Zones are organized in zone groups. You can add an unlimited number of zone groups to each arena. Within one zone group, zones must be non-overlapping.

important If zones within a zone group are overlapping, the overlapping area is excluded from both zones.

Zones that do not overlap

If two or more zones do not overlap, like the quadrants of a Morris water maze, then define them in the same zone group.

To create a new zone group, select the arena and then click the Add Zone Group button in the lower part of the Arena Settings window.

You cannot edit zone groups that contain zones that have been used in Trial Control (for example, to start tracking when the animal is detected in that zone) or have been used as hidden or entry zone. However, you can add new zone groups and there add zones. These zones then can be used, for example, for analysis.

To analyze zones in the same group as one, see Cumulative zones .

Zones that do overlap

If you want to define zones that overlap, define them in separate zone groups or use cumulative zones.

example In a circular open-field, you want two circular zones (Center and Border) and four quadrant zones (NW, NE, SW, SE). Create two zone groups: one with the two circular zones, and one with the four quadrant zones (see below).