Acrobat 9: Overprint Preview

In v7, the option to view a file in OP Preview was on the main menu bar (Advanced, I think). I could toggle it on and off at will. Convenient.

In v9, the only place I find any OP setting is in Preferences>Page Display. Is this correct?

If so, can I assume Use Overprint Preview>Automatic will toggle on OP Preview when a file has overprinting and not when the file has none? Is this the setting most of you use?

With this setting, can I assume the only way to turn off OP Preview when viewing a file with overprinting is to return to preferences settings?

Thanks.