I guess I wasn't clear enough with my question....
I know you can control the size of the picture that is uploaded throught he Admin center, but that doesn't control the display on the details page...I want to have the full-size image (1024 x 1024) availble for download, but display on details.php a smaller version of the full size -- say around 300 - 400 pixels.
What I need to know is WHERE (not how) in the details.php page would I edit code to control how the image is displayed on the details.php page? I'm looking at the code, but I'm not seeing what I need....can anyone help?