You can change the type of an association link.

1. Use the association link button on the UML Class Diagram Tool Palette to draw association links between diagram elements.
2. The Object Inspector enables you to set the link type (association, aggregation, or composition) and the cardinality of the client and supplier.
3. You can also set the link type using the right-click menu of the link. When you create an association link, UML modeling defines a field in the client class (the start of the link).

1. Choose ViewObject Inspector if the Object Inspector is not open.
2. Select a link on the diagram. The properties for the link appear in the Object Inspector.
3. In the Object Inspector, select the Directed field.
4. Click the drop-down arrow and select the Directed property (True or False) from the list.