Subtract areas

OALLEY allows you easily modifying the shape of your zones, by merging or subtracting 2 zones.

Subtracting zones can be used to remove one zone from another. This can be useful to adjust an area’s border to another one, or to shrink an area by removing another one.

To subtract 2 zones, go to the map.

Once you’re on the map, right-click on the zone you’d like to shrink, and choose “Subtract”:

As a second step, click on the zone you’d like to remove from the first one, and validate your choice:

Now you know how to subtract zones to shrink them or adjust their border.


To go further:

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