STONE, WOOD, METAL, MESH: PRINTS AND PRINTMAKING This excellent overview of techniques is didactic in the best sense of that word, with more than 150 lessons offered from the likes of John James Audubon, Edward Hopper, Jasper Johns, and J. A. M. Whistler. Through March 17. Addison Gallery of American Art. 978-749-4015, www.addisongallery.org

FRAME BY FRAME: PHOTOGRAPHIC SERIES AND PORTFOLIOS FROM THE COLLECTION Frame is the name of the game, since the photographers in this superb show are named Robert Frank, Aaron Siskind, Bruce Davidson, William Eggleston,William Christenberry, and Bill Owens. Through April 14. Addison Gallery of American Art. 978-749-4015, www.addisongallery.org Mark Feeney