Astah User's Guide
There are two ways to create Associations
Choose [Association Class] from tool palatte and click two targets.
Move a mouse over a model and choose from its suggested list.
Association name will appear when you add its name directly on the diagram.
To show direction of the association, select [Name Direction] - [Visibility]. To change the direction, click [Reverse Direction].
※To show the direction, you have to name the association first.
You can edit navigation of the association and its type such as Compositions and Aggregations, you can change it from the pop-up menu or property view.
There are two ways to create an Association Class.