How To Write
Compelling Action Lines
In Your Screenplay

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How To Write Compelling Action Lines In Your Screenplay


Action lines are the backbone of any screenplay. They set the scene, describe the movements, and create the atmosphere that brings your story to life. But writing great action lines is more than just narrating what happens; it's about engaging the reader and making your script an irresistible page-turner. In this guide, we'll explore how to write action lines that pop off the page and draw your audience into the world of your screenplay.

¿Qué son las líneas de acción en un guion?

Action lines, also known as scene descriptions, tell the reader what is happening on the screen. They cover everything from the setting to the characters' actions and movements. Here’s what makes action lines so critical:

  • Ellos pintan la imagen visual.
  • They provide context and detail to the dialogue.
  • Ellos impulsan la narrativa hacia adelante.

¿Qué tan largas deben ser las líneas de acción?

Action lines should be concise yet descriptive. The goal is to provide enough detail to visualize the scene without bogging down the reader with unnecessary information. A good rule of thumb is to keep action lines to two to three lines of text. If more description is needed, break it up into shorter paragraphs to maintain readability.


Waves crash against the shore. A lone surfer paddles out, glancing back at the receding coastline.

Notice how this description sets the scene quickly and efficiently.

¿Cómo indicar la acción en un guion?

Indicating action in a script involves more than just describing what happens. It’s about selecting the right words and structure to convey the action clearly and dynamically.

Usa voz activa

Always use active voice in your action lines. Active voice makes your writing direct and vigorous. Instead of 'The ball was thrown by John', write 'John throws the ball'.

Sé específico y visual

Show, don’t tell. Instead of writing 'John is angry' show his anger through actions: 'John slams his fist on the table, eyes blazing'.


John paces back and forth, muttering under his breath. He suddenly stops, grabs a vase, and hurls it across the room.

¿En qué tiempo verbal deben estar las líneas de acción?

Action lines in a screenplay should always be in the present tense. This creates immediacy and keeps the reader in the moment, experiencing the events as they happen.


Birds chirp in the canopy. A deer cautiously steps out from the underbrush, ears twitching.

Consejos para escribir excelentes líneas de acción

1. Mantén lo visual

Remember that scripts are visual mediums. Focus on what the audience will see and hear. Avoid internal thoughts or feelings that cannot be visually expressed.

En lugar de:

Sarah feels scared as she walks down the dark alley.

Escribe esto:

Sarah's eyes dart around the dark alley. She hugs her coat tightly around her.

2. Sé conciso

Every word in a script should serve a purpose. Trim unnecessary words and avoid over-explaining. This keeps the action moving and maintains the reader's interest.

En lugar de:

The old wooden door makes a loud creaking sound as it slowly swings open, revealing a dimly lit room filled with dusty furniture.

Escribe esto:

The old wooden door creaks open, revealing a dim, dusty room.

3. Usa verbos fuertes

Strong, specific verbs can make your action lines more vivid and engaging. Choose verbs that convey precise action and emotion.

En lugar de:

Ella camina rápidamente hacia el coche.

Escribe esto:

Ella corre hacia el coche.

4. Divide el texto

Long blocks of text can be daunting. Break up action lines into manageable chunks to improve readability. This also creates a natural rhythm and pace.


Mary chops vegetables at the counter. She pauses, glances at the clock, then resumes with renewed urgency.

The kettle whistles. Mary rushes to turn off the stove.

Errores comunes a evitar

1. Sobrecarga de detalles

While it’s important to be descriptive, avoid overloading your action lines with too many details. Focus on the essentials that drive the story and create a vivid picture.

2. Usando voz pasiva

Passive voice can make your writing feel weak and indirect. Stick to active voice to keep the action lively and engaging.

3. Escribir pensamientos internos

Remember, a screenplay is a visual medium. Avoid writing internal thoughts or feelings unless they can be clearly shown through action or dialogue.

Ejemplos en formato de guion

Ejemplo 1:


The door jingles as JANE, 30s, strides in. She scans the room, spots an empty table, and heads towards it.

At the counter, a BARISTA prepares a cappuccino, steam hissing from the machine.

Ejemplo 2:


Rain pours down, glistening on the pavement. A TAXI speeds past, splashing water onto the sidewalk.

A MAN in a trench coat huddles under an umbrella, hurrying to his destination.

Ejemplo 3:


Rows of bookshelves stretch into the distance. STUDENTS whisper and take notes.

In the corner, EMILY, a studious teenager, flips through a thick textbook, her brow furrowed in concentration.

En Conclusión

Writing great action lines in your screenplay is a skill that can elevate your storytelling and make your script stand out. By keeping your descriptions concise, visual, and active, you create a dynamic and engaging reading experience. Remember to use present tense, strong verbs, and to break up text for readability. With practice and attention to detail, your action lines will effectively draw readers into your cinematic world.

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