Add a Lightbox Display to the Gallery Block
- Open galleries in lightbox: This will automatically add a lightbox display to images in the “Gallery” block.
- Image caption: This feature will automatically take the ALT text for an image and show it as captions for images in lightboxes.
Add a “Gallery” block to your content:
Even though a “lightbox” setting isn't visible, you will be able to click on any image in the gallery and see it in a lightbox:
WordPress allows you to add ALT text to images, using this setting in the Media Library:
This ALT text will appear as a caption below the lightbox image: