A screenplay is not a story. It’s a set of instructions for making a film. The prose writer’s job is to create an experience on the page. The screenwriter’s job is to describe a sequence of images and sounds that, when shot and edited, creates that experience on screen. That shift in purpose changes everything about how you write.
Most early screenplays read like a novel with some dialogue dropped in. Learning the format is the easy part. Learning to think in images is the whole game.
The basics of screenplay format
Screenplays follow a strict visual format. The conventions exist so that each page equals roughly one minute of screen time. A 110-page screenplay should produce a film around 90 to 110 minutes long. That math only works when the format is consistent, which is why deviating from it is a signal to anyone reading that the writer is new.
The four main elements are:
| Element | What It Is | Example |
|---|---|---|
| Scene heading | Location and time of day, always in caps | INT. KITCHEN - DAY |
| Action line | What the camera sees, written in present tense | MARA stares at the empty chair. |
| Character cue | Speaker’s name, centered, before their dialogue | MARA |
| Dialogue | What the character says, indented under the cue | He wasn’t coming back. I knew that. |
That’s the entire grammar of a screenplay. Everything else is a variation on these four. That includes parentheticals (short notes under a character’s name that tell the actor how to deliver a line), V.O. (voice-over, when a character narrates from off screen), O.S. (off-screen, when a character speaks but isn’t visible), and transitions like FADE OUT. Use screenwriting software like Final Draft, WriterDuet, or the free Highland 2 to handle the formatting automatically. Or write and develop your screenplay in Storyboon Studio, where you get story structure feedback as you write so you’re not just formatting correctly — you’re building a story that works.
Writing in images, not prose
The most common mistake in screenplays is writing what characters feel rather than what the camera can see.
“Marcus feels guilty about what he did.” That’s a thought. A camera can’t shoot a thought. “Marcus picks up the photograph, then sets it face-down on the table.” That’s an image. A camera can shoot that, and an audience can read what it means.
This is why screenwriters talk about visual storytelling constantly. Every beat of your story needs to be expressible as something that can be seen or heard. If it can’t be filmed, it can’t be in your screenplay.
The filmability test: Read each action line and ask whether a director could shoot it as written. If the line describes a character’s internal state without showing a corresponding action or expression, rewrite it. The audience sees what the character does, not what they feel.
The same applies to dialogue. Screenwriting dialogue is not the same as writing realistic speech. It’s compressed, purposeful, and almost always doing double duty: revealing who the character is, pushing the story forward, or saying something deeper beneath the words. Every line should be doing at least one of those things. Lines that do neither get cut.
The page-per-minute rule
One page of properly formatted screenplay equals approximately one minute of screen time. This is a genuine structural tool, not just a rough estimate.
A feature film runs between 90 and 120 minutes. Most commercial screenplays target 100 to 115 pages. Anything shorter reads as underdeveloped. Anything longer signals pacing problems or an inability to cut. Producers, agents, and script readers look at page count before they read a single word.
The page-per-minute rule also tells you where your beats should land. If your protagonist doesn’t make their first major choice until page 40, something is wrong. If Act Two ends on page 20, something is wrong. The page count is a map, and being off the map is readable.
Structuring your story with Save the Cat
The most widely used structural framework for screenwriting is Blake Snyder’s Save the Cat beat sheet: 15 beats mapped to specific page numbers across a 110-page screenplay. Knowing where each beat belongs gives you a structural skeleton before you write a single scene.
| Beat | Page | What Happens |
|---|---|---|
| Opening Image | 1 | A visual that shows the protagonist’s world before transformation |
| Theme Stated | 5 | Someone states the film’s theme to the protagonist, who doesn’t yet understand it |
| Set-Up | 1–10 | Establish the protagonist, their world, their flaw, and what’s missing |
| Catalyst | 12 | The life-changing event. The protagonist can’t go back to before. |
| Debate | 12–25 | Fear vs. desire. Should they take the leap? |
| Break into Two | 25 | The protagonist chooses. Act Two begins. |
| Fun and Games | 30–55 | The promise of the premise. This is why the audience bought the ticket. |
| Midpoint | 55 | False victory or false defeat. Stakes go up. The fun is over. |
| All Is Lost | 75 | The lowest point. A “whiff of death,” literal or metaphorical. |
| Dark Night of the Soul | 75–85 | The protagonist mourns and finds the final piece of the puzzle. |
| Break into Three | 85 | Fresh insight. The protagonist decides to fight. |
| Finale | 85–110 | Apply everything learned, confront the antagonist, achieve transformation. |
| Final Image | 110 | The opposite of the Opening Image. Shows the world after. |
The Opening Image and Final Image are worth paying particular attention to. A great screenplay shows you the protagonist’s world before the story and after, and the contrast between those two images is the story. If your Opening and Final images aren’t meaningfully different, the character hasn’t changed, and the film doesn’t have a through-line (a single emotional thread running from the first page to the last).
Storyboon uses Save the Cat to generate screenplay outlines from a pitch, mapping all 15 beats with page targets so you can see the full shape of your story before you start writing scenes.
Ready to map your screenplay? Storyboon’s Story Outline Tool builds a full Save the Cat beat sheet from your pitch, with page numbers for all 15 beats.
Outline Your Screenplay →What screenwriting is not
Screenwriting has a few hard conventions that new writers break constantly. Here’s what to avoid:
Don’t direct from the page. Camera directions like “CLOSE ON,” “TRACKING SHOT,” or “SMASH CUT TO” are the director’s job. Using them throughout your script marks you as an amateur and makes the script harder to read. The exception: if a specific shot is essential to the story (a character’s hand, not their face), you can use it once. Don’t make it a habit.
Don’t write unfilmable action. “She thinks about her mother” is not a screenplay line. Neither is “A sense of dread fills the room.” Describe what the camera sees, not the atmosphere you’re hoping the director creates.
Don’t overwrite action lines. Action lines should be short. Two to four sentences per paragraph is the standard. Long action blocks slow the read and signal that the writer is writing prose, not a script. White space on the page is a feature, not a problem.
Don’t use parentheticals to direct performance. Writing “(sadly)” before a line tells the actor how to deliver it. That’s not your job. If the emotion isn’t clear from the line and the context, fix the line.
The one thing that separates readable scripts from unreadable ones
Pacing. Specifically, the density of the page.
A page of screenplay should be easy to read in about a minute. If your pages are dense with long action blocks and dialogue full of acting directions, they’ll read slow and feel slow. A well-paced screenplay moves. Readers flip through it. That kinetic quality starts with how the page looks before a word is read.
Keep action lines lean. Cut any line that doesn’t show something new. Let the white space work.
