During rehearsals the director the actors plot their movements. this is called…

The answer is blocking.

Explanation:

Blocking is a concept in theatre staging, referring to where an actor should position him or herself during a scene in a play. This positioning is determined by the director, with consideration over stage and play elements, such as lighting, audience, and scene content. This term is also used in the film industry, though in this setting, blocking refers to how an actor is positioned in a camera frame instead of a stage.