If you’ve ever wondered what is a screenplay, you’re not alone — and the answer is simpler than most people expect. A screenplay is a written document that describes a story through what can be seen and heard on screen. It captures the characters, their dialogue, the locations, and the action — all laid out in a very specific, standardised format that the entire film industry uses.
That last part matters more than most beginners realise. The format isn’t aesthetic preference. It’s a working blueprint for dozens of departments — directors, actors, cinematographers, production designers, location scouts — who all read the same document at the same time.
The Core Definition
A screenplay describes a film story in terms of what an audience will see and hear. Nothing else. No inner monologue. No backstory unless it’s dramatised on screen. No description of what a character feels unless it shows in their face or body.
This is the central discipline of the form: if you can’t photograph it or record it, it doesn’t belong in a screenplay.
A produced feature film screenplay is typically 90 to 120 pages long, with the widely-used rule of thumb suggesting one page equals roughly one minute of screen time. This isn’t a law of physics, but it holds up well enough that the industry treats it as a reliable shorthand.
Three Main Components
Every screenplay — whether it’s a two-minute short or a two-hour blockbuster — is built from the same three structural elements.
Scene Headings
Also called slug lines, scene headings tell the reader where and when each scene takes place. They follow a strict format: INT. or EXT. (interior or exterior), followed by the location, followed by the time of day.
INT. COFFEE SHOP - DAY
EXT. ROOFTOP - NIGHT
They’re always written in capitals. They reset the reader’s eye, cue the production designer, inform the lighting department, and give the script supervisor a clear breakdown tool.
Action Lines
Action lines describe what’s happening on screen. They’re written in the present tense, in short paragraphs, with a strong visual bias. Good action lines paint a picture without directing the camera.
The golden rule: describe, don’t direct. “Maria moves to the window, staring out at the rain” is an action line. “CLOSE ON Maria’s tear-streaked face — SLOW MOTION” is a camera direction, and it doesn’t belong in a spec screenplay.
Dialogue
Dialogue is the spoken exchange between characters. On the page, it’s laid out with the character name centred above the lines, an optional parenthetical (a brief acting note in brackets), and the actual dialogue below, indented and narrower than the action lines.
MARIA
(quietly)
He's not coming back, is he.
Parentheticals should be used sparingly — trust the actor and the line itself to carry the meaning.
How Screenplays Differ From Other Forms
New writers often confuse a screenplay with related but distinct formats:
Prose fiction lets you live inside a character’s head for pages at a time. A screenplay cannot. Every moment must be external and observable.
Stage plays share the dialogue-and-action structure but are written for physical performance in front of a live audience. Screenplays assume a camera mediating the experience — which changes everything about pacing, description density, and scene length.
A treatment or outline is a prose summary of a screenplay’s story. It describes what happens in plain language, without formatting. A treatment is a development tool. A screenplay is a production document.
The One-Page-Per-Minute Convention
The page-per-minute rule exists because of how screenplays are physically formatted. Courier 12pt, specific margins (left 1.5”, right 1”, top and bottom 1”), and the visual density of scene headings and dialogue blocks all combine to produce pages that, on average, correspond to roughly one minute of screen time.
This makes the screenplay a rough schedule estimator before a single frame is shot. A 100-page script suggests a 100-minute film. A 12-page short script suggests a 12-minute short. That estimate helps producers, directors, and line producers do basic planning long before a proper shooting schedule is drawn up.
Standard Format Rules
Formatting matters in the professional world for a very specific reason: anyone who picks up a properly formatted screenplay can navigate it instantly. The format is a shared language.
Key rules for a spec screenplay (a script written on your own initiative, to sell or submit):
- Font: Courier 12pt, always. Not Times New Roman. Not Arial. The spacing characteristics of Courier are baked into the page-per-minute rule.
- No scene numbers: Scene numbers appear in shooting scripts, not spec scripts. They’re added by production, not the writer.
- No camera directions: Don’t write CLOSE ON, PAN TO, or SMASH CUT unless you’re also the director working from your own shooting script.
- No “we see” or “we hear”: These constructions pull the reader out of the story. Instead of “We see a crow land on the fence,” write “A crow lands on the fence.”
- No internal emotional description: Don’t write “Jake feels a wave of shame.” Write what Jake does that shows the shame.
Spec Script vs Shooting Script
A spec screenplay is the writer’s document. It’s clean, uncluttered, and focused entirely on story. This is what you submit to competitions, agents, producers, and development executives.
A shooting script is the director and production team’s document. It contains scene numbers, specific camera directions, revised pages (marked in different colours), and sometimes additional technical annotations. It’s created during pre-production, usually after the spec has been developed and greenlit.
As a writer, you write spec scripts. The shooting script is a later transformation of your work.
Why Short Film Screenplays Are the Best Starting Point
If you’re learning to write screenplays, the short film format is the most valuable training ground available. A five-to-fifteen page short screenplay forces you to:
- Master a single dramatic situation without sprawling subplots
- Write efficient, purposeful action lines
- Build character quickly through dialogue and behaviour
- Resolve a story in a compressed arc
Every craft principle that applies to a feature screenplay applies to a short — but the feedback loop is shorter, the commitment is lower, and the margin for learning is enormous.
Short filmmaking also ties directly into production planning. If you want to understand how a screenplay becomes a shot list and then a production, starting with a short gives you the full pipeline in a manageable form.
And if you’re writing for short film specifically, understanding how to break down your script into scenes and shots will take your screenplay from page to screen much more efficiently.
Getting Your Format Right From Page One
Getting the format right from the beginning matters. Sloppy formatting signals to industry readers that the writer doesn’t know the craft — and in a field where first impressions matter enormously, that’s a hard hole to climb out of.
The good news: once you know the rules, they become second nature. The structure supports the storytelling rather than fighting it. Most working writers say the format almost disappears when they’re deep in a scene — it becomes as natural as grammar.
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