All the scenery, furniture and props the audience sees at a production of a play make up the set design. The set designer's job is to design these physical surroundings in which the action will take place. The set may also need to be designed so the backstage areas used by the actors and stage crew are kept out of sight from the audience. This will depend on the effect the director wants to create with the staging and on the type of stage the production uses. All the things appearing on the stage other than the scenery are called stage properties, or props. Set props like furniture, draperies, circus equipment and decorations are the types of things that complete the set and they need to be part of the set design.