Lightbox zoom layer

Hi,

I would like my image (to enlarge) to be visible on hover.
1. What CSS code do I need to write? Also where am I supposed to write this?
2. Is there a possibility for the enlarged images to go to the next one without closing it? Right now there are no arrows to cycle through the images in the lightbox.

I would greatly appreciate a quick response. I’ve already left a ticket about this on your support too.

Thanks
Seema

The page I need help with: [log in to see the link]