3. Staging

This principle is akin to staging as it is known in theater and film. Its purpose is to direct the audience's attention, and make it clear what is of greatest importance in a scene; what is happening, and what is about to happen, whether that idea is an action, a personality, an expression or a mood.This can be done by various means, such as the placement of a character in the frame, the use of light and shadow, and the angle and position of the camera.The essence of this principle is keeping focus on what is relevant, and avoiding unnecessary detail.

For eg. a lot of time you might have seen that when a important character enters a scene the camera moves from his feet upward to his face that tells us how important that character is we want to show a impact with him.So by making him take maximum amount of screen presence we let the audience have their focus on him.