When expecting a gallery, do you just see the shortcode on the frontend like this? Then your shortcode does not get processed. The reasons behind that could be: JIG is disabled. Check JIG on the plugin list of the WordPress Dashboard, it should be active, not only installed. Shortcode processing is disabled for the content area you are using. In...
It may be surprising but this error may indicate just what it says. "There are no photos with those IDs or post * does not have any attached images!" You may have an empty shortcode or a malformed shortcode that defaults to being an empty shortcode. Without valid attributes belonging to an image source, a shortcode would just look for...
Unfortunately no, it's not possible to open a non-JIG thumbnail or text link to open in a lightbox of JIG. Assuming you mean prettyPhoto and/or PhotoSwipe. The technical explanation is provided so you can better understand why. The lightboxes in Justified Image Grid are not meant to replace your theme's solution, nor they should extend beyond JIG. This is to...
No, Justified Image Grid by itself is not a source and it's not another gallery management plugin. It uses Sources you know and probably use. Album-gallery relationships are already available using excellent solutions without much to improve upon, thus JIG didn't intend to re-invent the wheel. To have Album-gallery relationship, you need to use: NextGEN Gallery Facebook overview (single-level) Flickr...