[Tim Wood]

Ah, I see. There isn't a built-in way to do that. Out of curiosity what would you want to happen? Copy over just the styling? Copy over additional columns? What if your document has extra columns -- seems like you wouldn't want to remove them, but maybe you do.

All of this is possible with AppleScript; you might log a request at <omnioutliner@omnigroup.com> for us to write one as an add-on.