THE ANATOMY OF A MOVIE POSTER: The Work of Dawn Baillie. At Poster House, 119 W. 23rd St. (between 6th and 7th avenues), New York, through Sept. 8. 917-722-2439, posterhouse.org.

Bill Gold was a 21-year-old kid in the Warner Bros. art department when he came up with the red cursive title of the “Casablanca” poster and put a gun in Bogart’s hand so the movie wouldn ...