Responsibilities are short statements about either what a class must be able to do or what a class must know. Responsibilities are shown in the upper-right tree.
To create a new responsibility:
Select the class to have the responsibility. Click the New button or select New from the file menu. Choose Responsibility from the New dialog and click OK.
To delete a responsibility:
Select the responsibility to be deleted and press the Del key or choose Delete from the Edit menu. This action will also delete all associated collaborations.