Screen direction

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"Screen direction" is a term used in motion picture editing and refers to an underlying concept of cinematic grammar which involves the direction that actors or objects appear to be moving on the screen from the point of view of the camera or audience. A rule of film editing is that movement from one edited shot to another must maintain the consistency of screen direction in order to avoid audience confusion.

"Camera left" or "frame left" indicates movement towards the left side of the screen, while "camera right" or "frame right" refers to movement towards the right side of the screen. "Foreground" refers to the apparent space close to the camera (and thus to the audience), while "background" refers to the apparent space in the distance away from the camera and the audience.

As an example of screen direction in use, if an actor is shown in one shot walking from screen left to screen right, and then shown in the immediately following shot to be moving in the opposite direction (screen right to screen left), the audience will assume that the actor has changed direction and is walking back to where he started (in the absence of obvious contextual or environmental cues). If the shot shows him again moving from screen left to screen right (as in the first shot), the audience will assume that the actor is continuing his previous movement and extending it to apparently cover a greater distance, even if this is purely a fabrication of editing.

It is the responsibility of the director, cameraman, and script supervisor on the set to maintain consistency of screen direction so that later during editing the myriad short pieces of film can be properly assembled by the editor into a coherent film that tells the story intended.

Avant-garde, experimental, and some independent film and video productions often deliberately violate screen direction rules in order to create audience disorientation or ambiguity. However, unless done very skillfully, violation of screen direction can appear to the audience to be the result of filmmaker ineptitude rather than experimentation.