Their long, narrow dimensions make them difficult to frame. Instead of displaying just one, join three to make a rectangular photo collage. Join photos with one-inch-wide acid-free linen tape (try Gaylord Brothers acid-free linen tape, $13, 800-634-6307). Turn the photos facedown on a hard surface, overlapping them 1/4 inch. Press a strip of tape firmly over the seam, then trim it even with the edge of the photos. Tape the collage inside a mat and prop it on a tabletop.