[Plugin: NextGEN Gallery] How can I Stop image stretching?

Hello!

Quick display question. I have the gallery set to no effect so that each images is displayed in a page. Problem is that on widescreen or large monitors it stretches the images to fill the page. I suspect that this is so that large images will get reduced on smaller screens, which is great, but I really don’t like the image being stretched bigger then it was intended to be. Take a look at https://www.atlantabarstarz.com/nggallery/page-44/album-2/gallery-94/page/2323 for an example of what I mean.

Thanks in advance!
https://www.atlantabarstarz.com