Sharing an actual Q&A between Astah Support and customer regarding Sequence diagrams.
Are you doing modeling that maintains traceability?
I will explain how it is possible.
Scripts to convert Astah diagrams to PlantUML and mermaid.js.
In Astah, you can adjust lengths of lifelines and ExecutionSpecifications in UML Sequence diagram easily. You no longer adjust those lengths one by one. You can adjust them all once before you export diagrams to image files or print!
How to remove the message numbers in Sequence diagram.