A script marked with all the blocking, acting notes, and light and sound cues is the actor's edition prompt book, not the director's edition or the dramaturg's edition. The prompt book is the production's master copy: it fuses the script with every physical movement, vocal note, and technical cue so the stage manager can run the show from a single document. The actor's edition is the base text actors receive before annotations are added. The director's edition and dramaturg's edition serve different purposes.
The mechanism: how a prompt book accumulates blocking and cues
A prompt book starts as a clean script and becomes a control document through layered annotation. The stage manager, or in some houses the director, marks every element that must happen for the production to run identically night after night. The markings are not decoration. Each one encodes an instruction that a human must execute or verify.
Four annotation layers typically build up in sequence. The first is blocking, which records where each actor stands, moves, and crosses, usually written in pencil in the margins with abbreviations like "X" for cross and "C" for center. The second is acting notes, covering line readings, pauses, business with props, and emotional beats. The third is light cues, numbered points where lighting changes, written as "LX" followed by a cue number. The fourth is sound cues, marked "SQ" or "SND," covering music, effects, and live reinforcement.
The coordinating rule is the standby and the call. A stage manager writes "Standby LX 14" to warn the board operator, then "LX 14 GO" at the exact line or action that triggers the change. Every cue in a professional prompt book is tied to a specific trigger, either a spoken line, a physical action, or a timing count. That trigger discipline is what separates a prompt book from a heavily annotated script.
The distinction matters because the same physical object can carry different authority depending on who owns it. A director's copy records intent and vision. A prompt book records execution. When the two conflict during a run, the prompt book governs, because it is the version the stage manager actually calls from.
Which edition is which: a comparison
The four editions named in the keyword are often conflated, but they serve distinct functions in a production pipeline. The table below separates them by owner, content, and use.
| Edition | Primary owner | What it contains | When it is used | |
|---|---|---|---|---|
| Actor's edition | Each performer | Clean script, character breakdown, sometimes line notes | Rehearsal and performance prep | |
| Prompt book | Stage manager | Blocking, acting notes, light and sound cues, standby calls | Every rehearsal and performance | |
| Director's edition | Director | Concept notes, staging ideas, dramaturgical annotations | Pre-production and rehearsal planning | |
| Dramaturg's edition | Dramaturg | Historical context, textual variants, research | Development and rehearsal reference |
The actor's edition is deliberately sparse. Actors need a readable script, not a technical manual, and many theaters issue a plain text and let performers add their own blocking notes in pencil. The prompt book is the opposite: dense, cross-referenced, and technical.
A common confusion is that the director's edition is the most annotated copy. It often is heavily marked, but those marks express directorial choices rather than runnable cues. The prompt book is the only edition designed to be called from during a performance.
Quantified context: how many cues a real prompt book carries
The density of a prompt book scales with the complexity of the production, and the numbers are larger than most audiences expect. A straight play with minimal design might carry 40 to 80 light cues and 20 to 50 sound cues. A musical with moving scenery, follow spots, and orchestral reinforcement can exceed 300 light cues and 150 sound cues across a two-act evening.
Blocking annotations run into the hundreds as well. A two-hour play with a cast of eight might contain 200 to 400 individual movement notations, many of them short margin marks rather than full sentences. Acting notes are fewer, perhaps 50 to 150, because they cluster around pivotal scenes rather than continuous action.
Cue timing tolerances are tight. In professional and many regional houses, a light cue is expected to execute within roughly a quarter to a half second of its call, and sound cues tied to music must land on the beat. Those tolerances explain why the standby system exists: the operator needs advance warning measured in seconds, not a surprise instruction.
The physical format has shifted but not disappeared. Paper prompt books remain common because they tolerate pencil edits, tabbed dividers, and quick page turns under low light. Digital prompt books in production software are increasingly used for complex shows, but many stage managers still print a paper backup for the run.
The counterintuitive caveat: the prompt book is not the director's
The most persistent misconception is that the prompt book belongs to the director. It does not, and the distinction has real consequences. The director builds the production during rehearsal and then typically steps back once the show opens. The stage manager holds the prompt book and is responsible for preserving the production's shape after the director leaves.
This means the prompt book is a continuity instrument. If a substitute actor joins mid-run, the prompt book is the reference that tells them where to stand and when to move. If a cue drifts, the stage manager compares the live show to the book and restores the intended timing. The director's vision lives in the director's edition; the runnable version lives in the prompt book.
A second counterintuitive point concerns acting notes. Actors often assume their personal script notes are authoritative. In practice, the prompt book's acting notes are the production-level record, and an actor's private annotations may diverge from what the stage manager is calling. When those diverge, the production reconciles them in a line note or a rehearsal, not by silently trusting one copy.
Red flags and edge cases
Several failure modes show up repeatedly in production practice, and each has a recognizable warning sign.
Cues written without triggers: a light cue marked only with a number and no line or action reference will drift the moment pacing changes. Standbys missing before complex sequences: operators need warning, and a missing standby is a leading cause of missed cues. Blocking notes in only one person's copy: if the stage manager's book and the actors' books disagree, the run destabilizes. Acting notes that contradict the director's blocking: unresolved conflicts surface as inconsistent performances across nights. No paper backup for a digital book: a software failure during a live show has no recovery path without a printed copy.
Edge cases complicate the picture further. Site-specific and immersive productions often run without a traditional prompt book because there is no fixed cue sequence. Improvisational formats may keep only a cue sheet rather than a full book. Touring productions sometimes maintain a separate road book optimized for quick load-in, with cue triggers rewritten for unfamiliar venues.
Practical actions: building or auditing a prompt book
Whether you are a stage manager assembling a book or an actor checking whether you have the right edition, the workflow below gives concrete steps and thresholds.
First, confirm which edition you hold. If the script has no cue numbers, no standby calls, and no margin blocking, it is an actor's edition or a director's working copy, not a prompt book. A genuine prompt book will show numbered light and sound cues tied to specific lines or actions.
Second, verify trigger coverage. Walk the script and confirm that every cue has a written trigger. A practical threshold: if more than about 5 percent of cues lack a trigger, the book is not performance-ready.
Third, test the standby chain. For any sequence with three or more cues in under a minute, the book should show explicit standbys. If it does not, add them before the next run.
Fourth, reconcile blocking against the blocking notation in the stage manager's copy. Discrepancies of more than a step or two in position should be resolved in a rehearsal, not improvised.
Fifth, maintain a paper backup. Print the book at least once before opening and keep it in the stage manager's desk. Update the print when cues change.
Sixth, version the book. Date each revision and note what changed. A book without revision dates becomes impossible to audit after a few weeks of rehearsal.
Limitations: what a prompt book cannot tell you
A prompt book is an execution record, not a complete account of a production. It captures cues and blocking but not the reasoning behind them. It does not preserve the director's intent, the dramaturg's research, or the actor's interpretation. Those live in the other editions and in rehearsal history.
The format also has practical limits. Paper books degrade with handling, and digital books depend on hardware and power. Neither survives a lost book without a backup. And a prompt book is only as good as its currency: a book that has not been updated after a staging change will actively mislead the operator.
The editions themselves are not standardized across the industry. Different companies and training programs use the terms loosely, and some productions merge the director's and stage manager's functions into one annotated copy. When terminology is ambiguous, ask which copy is called from during performance. That copy is the prompt book, whatever it is labeled.
This article is general educational information about theatrical production practice, not a professional stage management standard or a substitute for training. Practices vary by company and union agreement, so consult your production's stage manager or a qualified theater professional for guidance on your specific book.