WP Featherlight is a WordPress lightbox plugin for adding a minimal, high-performance, responsive jQuery lightbox to your WordPress website. At its core, WP Featherlight is a WordPress plugin wrapper for the Featherlight jQuery lightbox plugin. When installed, the plugin will automatically display all standard WordPress images and galleries in a simple, minimalistic lightbox popup.
In order for WordPress images and galleries to be lightboxed, you need to select the “Media File” option when choosing where the thumbnails should link. You can also select the “Custom Link” option if you make sure to link directly to an image file. This should work for any image file, even if it’s hosted on another website. It’s also possible to lightbox videos, iframes, and ajax content with WP Featherlight by adding data attributes to your content. For more details on custom content loading, check out the featherlight documentation.
There are no settings for WP Featherlight, so you should be able to install it without needing to configure anything. In the event you don’t want a lightbox on certain pages or posts, there is an option to disable it from within the post editor screen.