How to generate ER diagram from the command line?

Hello, I'm a new DBVisualizer user and so far I like what I see. I've generated a few ER charts using the tool's reference view and I have exported these to some image files that I can use as a reference. What I would like to know: Is it possible to generate ER diagrams for a connection from the command line? I've been looking in the User Guide and from the document, I get the impression that I would have to write a SQLCommander script to make that work, but the SQLCommander's help page on exporting is made for exporting the result set of running SQL statements and not generating the ER graph like I would want. Any help or pointers would be appreciated. Thanks, -Stu