Miller does not stop there. Even though the action of the play can shift from one part of the house to another without delay, the action is still limited to the present. Willy's dreams, memories, or recollections of past events must be revealed in a manner that is distinct from actions taking place in the present. This is important for two reasons: First, the audience must be able to differentiate between the present and the past in order to follow the action of the play; second, Willy's increased agitation must be apparent to the audience, and there is no better way to reveal it than to have the audience observe his inability to separate the past from the reality of the present.
Miller achieves this effect by manipulating the space and boundaries of the rooms. When action takes place in the present, characters observe wall boundaries and enter and exit through the doors. During Willy's recollections of the past, characters do not observe wall boundaries, and the action generally takes place in the area at the front of the stage, rather than inside the house. As a result, the audience can distinguish present events from Willy's memories. For example, in Act I, Scene 3, Willy pours a glass of milk in the kitchen, sits down, and begins to mumble to himself. He is in the present. He then remembers a past conversation with the teenage Biff and resumes the conversation. Since this is a past event, Willy directs his speech through the wall to a point offstage. This cues the audience that Willy is digressing in the past.
