Newbie question - how to see different drawings within one .dwg file

I do not have AutoCAD, but I need to tell a friend in another city how to see the different drawings contained within the single .dwg file I forwarded him from a third party.

Is there a thumbnail function that shows all the drawings (views?) at once? Or is there a menu item to takes a user straight to a list of the drawings within that file?

Thanks very much.