craft "how-to" programs on daytime television - Adventures in Sewing (1950), Food Is Fun (1950), and Kitchen Chats (1950). A 1950 article in Printers Ink, “Three-Camera Technique used to shoot TV film,” discussed Cinécraft’s innovative production style. In 1966, the studio made a film, “Cinécraft, Inc. Multi-camera Filming Technique Demonstration,” showing how the technique works and describing rear screen projection and teleprompters, other innovative technologies of the era In the late 1970s, Garry Marshall was credited with adding the fourth camera (known then as the "X" Camera, and occasionally today known as the "D" Camera) to the multi-camera set-up for his series Mork & Mindy. Actor Robin Williams could not stay on his marks due to his physically active improvisations during shooting, so Marshall had them add the fourth camera just to stay on Williams so they would have more than just the master shot of the actor. Soon after, many productions followed suit and now having four cameras (A, B, C and X/D) is the norm for multi-camera situation comedies. Sitcoms shot with the multiple camera setup include nearly all of Lucille Ball's TV series, as well as Mary Kay and Johnny, Our Miss Brooks, The Dick Van Dyke Show, The Mary Tyler Moore Show, All in the Family, Three's Company, Cheers, The Cosby Show, Full House, Seinfeld, Family Matters, The Fresh Prince of Bel-Air, Mad About You, Friends, The Drew Carey Show, Frasier, Will & Grace, Everybody Loves Raymond, The King of Queens, Two and a Half Men, The Big Bang Theory, Mike & Molly, Last Man Standing, Mom, 2 Broke Girls, The Odd Couple, One Day at a Time, Man with a Plan, Carol's Second Act, and Bob Hearts Abishola. Many American sitcoms from the 1950s to the 1970s were shot using the single camera method, including The Adventures of Ozzie and Harriet, Leave It to Beaver, The Andy Griffith Show, The Addams Family, The Munsters, Get Smart, Bewitched, I Dream of Jeannie, Gilligan's Island, Hogan's Heroes, and The Brady Bunch. The earliest seasons of Happy Days were filmed using a single-camera setup before the series transitioned to a multi-camera setup (which also occurred alongside its increase in popularity). These did not have a live studio audience, and by being shot single-camera, tightly edited sequences could be created, along with multiple locations and visual effects such as magical appearances and disappearances. Multiple-camera sitcoms were more simplified but