“If you can’t find it, design it.” Following that motto has led Lella and Massimo Vignelli through a design career that spans products, graphics, publications, furniture, and more. Kathy Brew and Roberto Guerra‘s documentary, Design Is One, traces the Vignellis’ legendary achievements–from New York’s subway signage and identity programs for Bloomingdale’s to Heller dinnerware and Venini lamps–alongside personal anecdotes from the likes of Richard Meier, Milton Glaser, Michael Bierut, and Jessica Helfand. Catch the film this month in New York City at IFC Center and later Symphony Space. It opens October 31 at the MFA Boston.