When a pedigree is displayed, click on the link that says "Click here to print a 5-generation pedigree."
To eliminate Headers and Footers from being printed you must modify the printer settings for your browser.
For Internet Explorer
On the browser menu click on File then Page Setup... and a dialog box similar to this will appear.

Delete the text in the Header and Footer section and click "OK".
For Netscape
On the browser menu click on File then Page Setup... and a dialog box similar to this will appear.

Uncheck the boxes in the header and footer section and click OK.