Im finding this:
Define Document View dialog box
Use this dialog box to define a document view to view external documents attached to an object.
To create a new document view, enter a new name in the Name field. Specify the location of the document name, the document type, and the application to use to display the document, and click Add.
To modify an existing document view, select it in the list. Enter new information in the Document View Definition section, and click Update.
Document view definitions are stored in the current drawing and not in the source drawings.
However not the command to invoke the dialog box, hmmm