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Before a cutting pattern can begin, there must be a shot that establishes the whole space. Examples of these shots are the initial two-shot of characters in a dialogue sequence, or the image of an entire roomful of people, or of the city in which the film takes place. Typically a long shot at the beginning of a scene designed to inform viewers of a change in location and to orient them to the general mood and relative placement of subjects in the scene.
What is an Establishing Shot?