[Plugin: NextGEN Gallery] How do I change the layout of images in the lightbox

I’ve figured out how to change the thumbnail styles, but I can’t figure out how to change the style of the actual lightbox. The main thing I would like to do is move the << >> navigation from the bottom to the middle of the image, and change the << >> to graphics. I would also like to add a X close graphic or something.

Any advice would be greatly appreciated.