Introduction
Current Maintainers:
Gallery Link provides a field formatter for image fields. You can display images as gallery triggered by a link.
Installation
Download fancyBox from GitHub [1]
Unzip the archive and put the fancybox folder inside into sites/all/libraries (so jquery.fancybox.pack.js is located at sites/all/libraries/fancybox/source/jquery.fancybox.pack.js)
Add an image field to a entity type and select "Gallery Link" as field formatter at the "Manage display" page.
Set some options and save them.