Enlarged picture on product page

where can I change the size of the enlarged picture on the product page, as when you click on the product image a very large image is shown where as in 1.9 the same images are much smaller, and I have used the same images on both versions.

Thanks

Steve

Check admin>configuration>settings>media settings
http://admin-demo.nopcommerce.com/Admin/Setting/Media

nope, looked in there, will check out code, what page/module controls the picture enlarge?

Steve