The Stage Managers Handbook Vocabulary Chapters 4-6

Cross
In blocking, to move from one area of the stage to another.
Downstage
The area of the stage closest to the audience.
On Book
When either the stage manager or an assistant is following the script in order to help actors when they stumble over lines.
Prompt
To help an actor with his lines when he either asks or is stumbling.
Prompt Corner
The area from which the stage manager runs the show. Usually found just to the right or left of the proscenium backstage. The stage manager often sits in the lighting or sound booth to call the show.
Blackout
A rapid extinguishing of all light onstage.
Pace
The tempo of the performance.
Call Board
The bulletin board used by stage managers to post any information pertinent to actors and crew, such as rehearsal schedules and costume fittings.