This is a sample using the Shortcodes Ultimate Lightbox feature.

[su_lightbox type=”inline” src=”#my-lightbox-content”]Click here to open lightbox.[/su_lightbox]

[su_lightbox_content id=”#my-lightbox-content” width=”90%”]This is my lightbox content. [/su_lightbox_content]

Documentation for this shortcode can be found here: https://docs.getshortcodes.com/article/76-how-to-use-lightbox-shortcode