Mise en scene refers to everything within the frame of a shot that can be used to convey meaning, including setting, props, costumes, lighting, and performance. Elements of mise en scene like lighting can be used realistically or expressively to set a mood. Camera techniques like shot size, angle, movement, and focus can also be manipulated to influence meaning. In film editing, continuity is maintained through matching shots and following conventions like the 180-degree rule, while sound can be diegetic elements natural to the scene or non-diegetic music added to set atmosphere.