Hi Ton

Yes, it's do-able. A LightBox is simply HTML code that calls a modal popup and it's a bunch of images you put in it. It will work as long as your page has Bootstrap framework. Most themes have it (all Revindex Themes come included with it). All you have to do is stick the appropriate HTML code in the Source view inside the editor.

You can see some example codes here:

https://demo.revindex.com...hortcodes/lightboxes

For more information on Modal dialog, you can read here:

https://getbootstrap.com/....6/components/modal/