Associate with Different Behaviors
On the 'Behavior' tab of the Properties window for the Behavior Call element, when you click on the 'Behavior' field button the 'Select Element' or 'Select Operation' dialog displays, listing all available behaviors in the model.
Select '<none>' to remove any existing association between an invocation and a behavior, or select another classifier to re-associate the invocation with a different behavior.
Theis enabled only if a valid behavior is identified in the 'Behavior' field.
Design > Element > Properties > Properties > Behavior