Mac OS X: Forcing a Document on an App
Wednesday, February 14th, 2007
Sometimes docked apps don’t want to open your document, even though they may be able to, so you have to coax (okay, force) them to give it a try. For example, let’s say you created a document in WordPerfect for Mac a few years back. if you drag that document to Microsoft Word’s icon in the Dock, chances are it won’t highlight (which would be the indication it can open that document). If that happens, just hold Command-Option, then drag the document’s icon to the Word icon in the Dock, and you can force it to try to open that document.
I didn’t know that and it sure is good to know. Thanks Apple.
(Source Apple Hot News.)

I usually open the ap and then open the document from within the application. Glad to know I can eliminate that step.
Caitlin: you can eliminate that step no matter what. Double click on a document and it will open the app that created it. Shame on you girlfriend, your fairy god father taught you that many moons ago. Must have been the pot. ;)