5. Select the new Lifeline.
The Properties window displays the properties for this Lifeline element.
6. In the Properties window, on the row labeled Representing Classifier, click the down arrow.
A drop-down list appears.
7. Select CashierStation from the drop-down list and press Enter.
8. Click in the Diagram editor to see the labeled Lifeline element.
Your diagram should resemble the following figure.