The set decorator is the head of the set decoration department in the film and television industry, responsible for selecting, designing, fabricating, and sourcing the "set dressing" elements of each set in a Feature Film, Television, or New Media episode or commercial, in support of the story and characters of the script. The set decorator is responsible for each dcor element inside the sets, from practical lighting, technology, art, furniture, drapery, floor coverings, books, collectables, to exterior furnishings such as satellite dishes, Old West water troughs, streetlamps, traffic lights, garden furniture and sculptures.

While the Set Decorator provides all of these elements, the Propmaster provides elements that are handled by the actor. For example: a library is decorated with set dressing such as the furniture, books, desk lamp, blotter, framed photos, personal effects, letter trays, letter opener, papers, paper files. The Propmaster provides the props the letter the actor is opening and reading, the pen he writes with, and the ink into which he dips his pen.

Hollywood Black Friday, or Hollywood Bloody Friday, is the name given, in the history of organized labor in the United States, to October 5, 1945. On that date, a six-month strike by the set decorators represented by the Conference of Studio Unions (CSU) boiled over into a bloody riot at the gates of Warner Brothers' studios in Burbank, California. The strikes helped the passage of the Taft-Hartley Act in 1947 and led to the eventual breakup of the CSU and reorganization of the rival International Alliance of Theatrical Stage Employees (IATSE) leadership.