[Zope] How to display PDF files

I installed Zope for purposes of evaluation last week. I've been through the tutorial so I have minimal knowledge. One (apparently simple) thing I cannot find a way to do is link to a PDF file. I believe that everything ZServer serves up must come from the Zope Object Database (right? wrong?). At any rate, how do you get ZServer to send a 'raw' PDF file to the browser so that the browser's Acrobat plug-in can display it? I tried creating 'File' and 'Image' objects. That's obviously not it. Forgive me, for I fear this is a dumb question ... but I just can't find the answer. Thanks, Alan