Vanilla 2

Hi,
I am using the pretty photo plugin for photo galleries. Currently, when you click on a thumbnail it opens the image in a medium width. In this medium window, I would like to interchange the "expand" button (in the upper-right corner) and the "close" button (in the lower-right corner) or I would like to remove the "expand" button.

Maybe is here someone with the solution.

Thank you very much