There is an addon for firefox called zoomfox. It allows you to isolate an image and then zoom it up. I know that when grading some of us put a magnifying glass to the screen. I think this might be more affective. https://addons.mozilla.org/en-US/firefox/addon/1067 Ruben
Ruben, we dont need to blow the image up digitally magnifying glass cannot be copied by any software dont trust me ask the GM
Another handy add-on is Fireshot. It lets you save entire pages on the web as an image. It makes for a handy way to keep a record of all your ebay winnings.