The industry standard for screenplay formatting is known as the Master Scene Format. This rigid structure exists for a singular, practical reason: in a professionally formatted script, one page of text translates to approximately one minute of screen time. This correlation allows producers, directors, and ADs (Assistant Directors) to estimate the film's length and budget with remarkable accuracy.

To achieve this "one-page-per-minute" rule, a script must adhere to specific font choices, margins, and structural elements. Deviating from these standards is the fastest way for a spec script to be rejected by a professional reader or agent.

The Foundation of Screenplay Formatting

Every professional screenplay shares a specific aesthetic that dates back to the era of mechanical typewriters. While technology has evolved, the visual language of the script remains unchanged to ensure consistency across the global film industry.

Why Courier 12pt is Mandatory

The only acceptable font for a screenplay is Courier 12pt (or a close variant like Courier New). Courier is a monospaced font, meaning every character—from a wide "W" to a thin "i"—occupies the exact same amount of horizontal space on the page.

This uniformity is the secret behind the timing of a script. Proportional fonts like Arial or Times New Roman vary in width, which would make it impossible to estimate a scene's duration based on page count. Furthermore, Courier creates a sense of "white space" that prevents the reader from feeling overwhelmed by dense blocks of text.

Essential Page Layout and Margins

If you are not using dedicated screenwriting software, you must manually set your margins to reflect these industry-standard measurements:

  • Left Margin: 1.5 inches (The extra space is required for the traditional three-hole punch binding).
  • Right Margin: 1.0 inch.
  • Top Margin: 1.0 inch.
  • Bottom Margin: 1.0 inch.
  • Character Names: Indented 3.7 inches from the left edge.
  • Dialogue Blocks: Indented 2.5 inches from the left edge.
  • Parentheticals: Indented 3.1 inches from the left edge.

The 5 Essential Elements of a Scene

A professional script is composed of five primary building blocks. Understanding how and when to use these elements is the core of the craft.

1. The Scene Heading (Slugline)

The Scene Heading tells the production team where and when the action occurs. It must always be in ALL CAPS and follows a specific tripartite structure: Interior/Exterior, Location, and Time of Day.

  • INT. (Interior): Used for any scene taking place inside a building, car, or enclosed space.
  • EXT. (Exterior): Used for scenes taking place outdoors.
  • Location: Be specific but concise (e.g., DINER - KITCHEN).
  • Time of Day: Usually limited to DAY or NIGHT, though DAWN or DUSK are acceptable if the lighting is critical to the story.

Example: INT. ABANDONED WAREHOUSE - NIGHT

2. Action Lines

Action lines describe what the audience sees and hears. They are written in the present tense (e.g., "He runs," not "He ran") and run from the left to the right margins.

The most important rule for action lines is "Show, Don't Tell." Do not write a character's internal thoughts or feelings. Instead, describe the physical manifestation of those emotions. Instead of writing "John feels guilty," write "John avoids eye contact, fidgeting with his wedding ring."

3. Character Names

When a character speaks, their name is placed on its own line in ALL CAPS, indented toward the center of the page. The first time a character is introduced in the action lines, their name should also be in ALL CAPS, followed by their age and a brief, evocative description.

4. Dialogue

Dialogue is the text spoken by characters. It is placed directly beneath the character name and is indented significantly from both sides to form a narrow column. This makes it easy for actors to find their lines during a table read.

5. Parentheticals

A parenthetical is a brief instruction regarding the delivery of a line or a small action performed during speech. These should be used sparingly. If the emotion of a line is obvious from the context, omit the parenthetical. Overusing them is often seen as "directing from the page," which can irritate actors and directors.

Comprehensive Script Writing Format Example

To visualize how these elements work together, consider the following original scene snippet. Observe the spacing, the use of capitalization, and the flow of information.