You can create UML Sequence diagrams.
You can set the diagram property such as visibility settings from the property view (left-bottom pane).
Since version 8.5 of Astah Professional and Astah UML, automatic diagram layout is available.
To use the auto-layout, go to [Alignment] – [Auto Layout] – [Vertical / Horizontal].
However, this auto-layout does not work for CombinedFragments. Therefore, you will have to relocate CombinedFragments by hand after all. So using [Gap Expander] and [Gap Remover] options may work better if your Sequence diagram contains several CombinedFragments.
You can create a lifeline by double-clicking on a diagram or choosing one from the tool palette and click on diagram.
There are three ways to add a base class to Lifeline.
You can add a base class to Lifeline box by directly typing its Class (Block) name after the Lifeline name.
You can drag a Class to Sequence diagram to create a lifeline with the class as its base class.
By dragging an Actor from the tree to diagram, you can represent lifeline in Actor on the Sequence Diagram.
After creating a Sequence diagram, you may want to adjust the length of Lifelines to clean up the diagram. Right-click on a diagram then select [Adjust Lifeline Length] and choose from these three options.
Make all the lifeline to the shortest possible.
|Align to Minimum|
Make all the lifeline to the same length as the shortest one on the diagram.
|Align to Maximum||
Make all the lifeline to the same length as the longest one on the diagram.
To clean up Sequence diagrams, you can minimize the length of Execution Specifications.
Right-click on a diagram then select [Adjust ExecutionSpecification Length].
You can hide the Execution Specifications.
Currently, this is available in Astah Professional, UML, and System Safety editions only.
1. Click anywhere on a diagram.
2. A property view for the Sequence diagram opens in the left-bottom pane.
3. Tick off the [Execution Specification Visibility].
You can create a Found message.
You can create a Lost Message.
You can create a Gate.
There are two ways to create Reply Messages.
You can create CombinedFragments.
There are two ways to add Operands to CombinedFragments.
You can enter texts and numbers from the CombinedFragment’s Property View.
You can create InteractionUse.