Larger colorbox image
How do I set a larger colorbox photos when I go through photos on an ad using the popup colorbox? Right now the image seems to be confined to 500x500 pixel, which is the same as the main ad image, but I'd like it to be bigger so visitors can see more details of the product/ad. I tried setting the Large image option on the Settings>Media to 640x640 pixel for example but the picture bled over the border, ruining the look of the theme.
Cheers!