The “page proxy” is that tiny document icon that you see in the title bar of an open document, just to the left of the document name. That page proxy is "live," and you can do a number of things with it, just as if it were the file icon itself.
Save the document (because it won’t work if you haven’t saved it), and then drag that page proxy from a title bar and drop it into an e-mail to send the file, an iChat text field to share it with someone else, a Bonjour user’s name to send the file to another computer on the network, into another folder to save a copy, into an iDisk folder to send it to your iDisk, or even drop it into another document.
The page proxy is not an alias! If you throw the proxy away, you will throw away the document. To create an alias, though, hold down the Option key and drag the page proxy anywhere you want.
Be sure to look back over my posts this week for more Mac OS X Leopard tips.
And for more on Mac OS X 10.5 Leopard, check out my books Mac OS X 10.5 Leopard: Peachpit Learning Series, The Little Mac Book, Leopard Edition,
and Robin Williams Cool Mac Apps: Twelve apps for enhanced creativity and productivity, Adobe Reader, 3rd Edition.