I needed an extra field for my images, so I installed AddInfo, edited my images to assign the values, and changed the template to display the value the way I wanted it on the picture page.  Great so far.  But I also want to include this info along with the image name under the thumbnail images when looking at the whole album.  I know php, and enough smarty to get by, but I'm new to Piwigo and I'm stumped.  Anyone know the answer?