Great stuff.
Took a couple of tries but managed to do it by right clicking on the the "print" link and selected "Copy Shortcut" then had to use <ctrl>+V to paste it into the address line before adding the &perpage bit.
The only reason I ended up doing it that way was that I couldn't get the address to show the full URL. Even typing in the URL that appears at the foot of the screen when hovering over the "print" link didn't seem to work.
Never mind at least there's a way. Oh Joy, Oh Bliss!!
