Automatic enlargement of containers when an object is placed

Lanes are always fully embedded in a pool or do not have a connection with a pool (lane without a pool). The same applies to tasks, subprocesses, gateways, start events, and end events.

If you place an object at the boundary of a container object, the container object is automatically enlarged. The newly placed object is fully enclosed within the container object. A connection of the belongs to type to the container object is automatically created.