A common term for laying out the various portions of a
theater stage.
Stage directions refer to the stage in nine general areas. The 'left' and 'right' are from the perspective of the performer, not the audience. 'Upstage' is near the back of the stage, and 'downstage' is closer to the audience.
upstage right upstage center upstage left
stage right stage center stage left
downstage right downstage center downstage left
To 'upstage' someone is to stand between them and the audience; they are then less visible. Many confuse this, and think that the edge near the audience is 'upstage'.