[Plugin: NextGEN Gallery] Class="Galleryview"

Using Firebug, I see a class called galleryview. I want to center vertical images (horizontal seem to work fine) and logic tells me that if I could add a centering code to .galleryview it would fix the problem (at least until an upgrade). How do I gain access to this class?

BTW, This centering issue is very common but I can’t seem to find a fix. I’m getting frustrated and I’m tempted to find another plugin, but I’ve already put too much time into it to want to seek this option.

https://www.ads-software.com/extend/plugins/nextgen-gallery/