In filmmaking, the 180-degree rule is a basic guideline regarding the on-screen spatial relationship between a character and another character or object within a scene. By keeping the camera on one side of an imaginary axis between two characters, the first character is always frame right of the second character. Moving the camera over the axis is called "jumping the line" or "crossing the line"; breaking the 180-degree rule by shooting on all sides is known as shooting in the round.