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✍️Screenwriting I Unit 2 Review

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2.2 Proper Use of Screenplay Elements (Slug Lines, Action Lines, Dialogue)

2.2 Proper Use of Screenplay Elements (Slug Lines, Action Lines, Dialogue)

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025
✍️Screenwriting I
Unit & Topic Study Guides

Screenplay elements like slug lines, action lines, and dialogue are the building blocks of any script. They help create a clear visual roadmap for the reader, guiding them through the story's locations, actions, and conversations.

Mastering these elements is crucial for effective screenwriting. By using them correctly, you'll craft a professional-looking script that's easy to read and visualize, setting the stage for your story to come to life on screen.

Scene Headings

Slug Line Format

  • Slug lines (also known as scene headings) indicate a change in location or time within the screenplay
  • Always written in ALL CAPS to visually separate them from other elements
  • Consist of three parts: interior/exterior, location, and time of day
  • Each part is separated by a period and a space (e.g., INT. COFFEE SHOP. DAY)

Interior and Exterior Designations

  • INT. is used for interior scenes that take place inside a building or structure
  • EXT. is used for exterior scenes that take place outside
  • Occasionally, I/E. or INT./EXT. is used for scenes that move between interior and exterior locations

Location Specificity

  • The location should be specific enough to give the reader a clear understanding of where the scene takes place (LIVING ROOM, CENTRAL PARK, TIMES SQUARE)
  • Avoid using overly general locations like "ROOM" or "OUTSIDE" unless absolutely necessary
  • If a location has already been established, it's acceptable to use a shortened version (JOE'S APARTMENT instead of JOE'S APARTMENT - LIVING ROOM)

Time of Day Consistency

  • Time of day is typically written as DAY or NIGHT, but can also include specific times (DAWN, DUSK, MORNING, EVENING)
  • Maintain consistency in the time of day throughout a sequence of scenes
  • Only include the time of day if it's relevant to the story or visuals (e.g., a sunset or sunrise)
Slug Line Format, Writing screenplays with Linux and open source tools | Opensource.com

Action and Character

Action Line Purpose

  • Action lines describe what is happening on screen, including character actions, visual details, and scene descriptions
  • Written in present tense and active voice to create a sense of immediacy
  • Should be concise and visually descriptive, focusing on what can be seen or heard on screen
  • Avoid including unfilmable elements like character thoughts or backstory unless absolutely necessary

Character Introductions

  • When a character first appears in the screenplay, their name is written in ALL CAPS followed by their age and a brief description (e.g., SARAH (30s), a no-nonsense lawyer)
  • Subsequent appearances of the character use regular title case (Sarah)
  • Minor characters may be introduced with a description only (BARISTA, TAXI DRIVER, PEDESTRIAN)

Transitions and Montages

  • Transitions indicate a change in time, location, or scene and are written in ALL CAPS (CUT TO:, DISSOLVE TO:, FADE IN:, FADE OUT)
  • Montages are a series of brief scenes or shots that convey a passage of time, a character's development, or a sequence of events
  • Montages are introduced with a slug line (MONTAGE) and each shot is described on a separate action line, often using dashes or hyphens to separate them
Slug Line Format, Chicago/Turabian: Structure and Formatting of Specific Elements | Boundless Writing

Dialogue Elements

Dialogue Formatting Basics

  • A character's name appears in ALL CAPS, centered above their dialogue
  • Dialogue is left-aligned and wrapped to a maximum of 35-45 characters per line
  • If a character's dialogue extends beyond one page, use (CONT'D) next to their name on the second page
  • Dual dialogue (two characters speaking simultaneously) is side-by-side, separated by a vertical line

Parentheticals and Wrylies

  • Parentheticals (also known as wrylies) provide brief descriptions of a character's action, attitude, or tone while speaking
  • Appear in lowercase, enclosed in parentheses, and are placed between the character's name and their dialogue (e.g., SARAH (whispering))
  • Should be used sparingly and only when necessary to convey important information not evident in the dialogue itself

Voice-Over and Off-Screen Dialogue

  • Voice-over (V.O.) indicates a character's thoughts or narration that is heard over the scene but not spoken by the character on screen
  • Off-screen (O.S.) indicates dialogue spoken by a character who is not visible on screen but is present in the scene
  • Both V.O. and O.S. are written next to the character's name, separated by a single space (e.g., SARAH (V.O.), JOHN (O.S.))

Intercutting Scenes

  • Intercut is used when two or more scenes are happening simultaneously, and the action cuts back and forth between them
  • Introduced with the slug line INTERCUT followed by the locations of the scenes (e.g., INTERCUT - PHONE CONVERSATION)
  • Each character's dialogue is preceded by their name and location to clarify where they are (e.g., SARAH (in car), JOHN (at office))
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