Indexhibit Support

Hi!
I'm trying to center the thumbnails using visual index (overlay) but I 'm stuck. Maybe some one of you can help me.... thank you!

Centering in which way?

horizontal! sorry

That's not clear at all...please explain what you are trying to center.

I want to center the thumbnails.
this is the link of what I have: agustinaandreoletti.com/reflectiveconversion/index.php/…. and I want it to look like this: postimg.org/image/apaktpgcj/

thank you for your help