My site is foxxmayaarchive.com

I would like to customize the lightbox X. I'd like to add "close" and make it a bit bigger and further from the corner. I found this forum with some code suggestions, but they aren't working. I think it's not directing to the right spot in the CSS...but maybe it's helpful. 

Thanks!

Hi,

How to open Lightbox? I tried clicking image on homepage but nothing appears.

Every page except the home page uses the lightbox. Here is a direct link: https://www.foxxmayaarchive.com/mexico-weaving

Something like this?

.gallery-lightbox-close-btn {
    position : relative;
}

.gallery-lightbox-close-btn:after {
    content : "Close";
    font-size: 18px;
    position : absolute;
    left : 50%;
    right : 50%;
    width: 80px;
    transform: translate(-50%, 0px);
}