180 degre rule and match on action.

180 degre rule.

• It's the rule in which there is an imaginary line crossing over the characters within a scene in which the camera isn't allowed to cross, but it can pan around in that 180 degre area, because otherwise the audience becomes disorientated as characters begin to switch between sides of the screen.Match on action

• This is when someone films a person opening a door from one angle and then changes the angle through a cut, but in doing so they need to carry on filming from the exact angle in which the door was opened at in the previous shot, otherwise you get a jump cut and the scene doesn't run as smoothly.