Fade or zoom the lightbox

FIrst of all, thank you for this plugin – I’ve been looking for a responsive lightbox that fills the screen as much as possible on mobile devices, and so far this one looks the best. It’s simple to use and easy to customize.

One thing that I would like to customize is how the lightbox opens and closes. Right now it’s a little abrupt, and I’d like to add a transition like fade or zoom in/out. I’ll study the code some more, but if you could point me in the right direction, I’d really appreciate it.

https://www.ads-software.com/plugins/responsive-lightbox/