I introduce you the method to create and navigate the index of artifacts (diagrams) with Astah.
How do you show modifed models to others? I introduce some methods with Astah.
Insert Model Diagrams to Office Documents with SVG Format
Astah’s “Reference Model Management” is a very powerful function which allows you to import other project models as read-only. So you can work on your models using other project models without worrying about altering them. When there’re any updates on the original models, Astah automatically detects it and informs you, so that you won’t miss to sync and can work with the latest models all the time.