Constraints for size changes
The following object types do not represent container objects:
Activity
Event
Subprocess
Gateway
Annotation
These objects can be part of a container object. The following objects represent container objects:
Pool
Lane
Subprocess
You can resize container objects. However, a container object may not be smaller than the objects placed in it.
Example 29.
If a pool has two lanes, and five tasks have been placed in each lane, the minimum size is restricted by the arrangement of the five objects of the Task type. The wrapper pool cannot be smaller. The lane objects are therefore resized accordingly.