I am totally new to this and trying to figure out what and how to edit this to make it work. I'd like to make a border that looks like a polaroid. So I imagine I'd need the 4 corners and then the white space to fill the sides. The problem with this is that each image uploaded has a thumbnail of a different dimension, no? Is there a way to make them the same dimension or cropped thumbnails to maximize say a square (polaroid)?