Optionally choose an image meta tag for image thumbnail captions, even a different meta tag for lightbox captions as well. For example, image Titles you add in Lightroom can be used for thumbnails, and image Captions you add in Lightroom can be used for the lightbox.
Meta Data Popup
Optionally show an info button next to lightbox image captions to reveal meta data. Clicking the info icon will show a list of data points in a nice popup. Popular EXIF, Lightroom, and Apple Photos data will be shown. EXIF GPS data even generates a google map link ?