This functionality was suggested by Dominique Faure.
With the "Template trail" feature (with the parameter
usetemplate=1), thumbnails will link to a wiki page containing the original pictures with some other formatting (done inside a Group/ImageTemplate page). Every "image trail" contains only the pictures from the thumblist/thumbgallery. Can it link to a trail from a different thumblist/thumbgallery?
I want to have single thumbnails, placed freely in the page, but linking to an image-template-trail, defined in the page, containing all of them. This is possible from version 85H.
Step 1: Define ("id=foo") a hidden thumbgallery containing the pictures
This should be at the beginning of the page. It displays nothing with
tlmode=-1. It needs
usetemplate=1 in order to cache the list of pictures. It needs the
id=some_unique_name parameter to identify the list. This unique name will be used later in thumbnails, with the parameter
usetemplate=some_unique_name. (In the example, some_unique_name is "foo".)
Step 2: Place your thumbnails linking to the defined trail