I'm drawing a class diagram in StarUML and can't find a way to add qualified associations. How can I add them?
The answer is in the StartUML documentation about association
In summary :
create your association : select Association (or Directed Association) in Toolbox, then drag from an element and drop on another element.
then edit the Association End by double-click on it to add it a qualifier (attribute), that means double-click on one end of the line as shown in quickEdits for relationship picture. The attribute used as qualifier must already exist very probably
All the documentation page :