Envira’s Printing Addon allows you to place a printing icon on your gallery images and in your lightbox.
Gallery configurations:
Automatic layout with lazy loading. Row Height set to 215 and 5px margin. Supersize, Deeplinking, Base (Dark) lightbox theme. 640×480 image size with no cropping and lightbox thumbnails enabled. Lightbox transition on open and close is set to No Effect and Lightbox transition for navigation set to Slide.