Set the scene page's left margin at 1 1/2 inches from the page's left edge. Set the right margin at 1 inch from the page's right edge.
Write the scene's slug line, or heading. Start at the left margin and write "INT." if the scene is indoors or "EXT." if it is outdoors. Follow this with a space, and the scene's location, such as "PAWNSHOP." Insert another space, then a dash, followed by the time of day in which the scene takes place. For example, INT. PAWN SHOP - EVENING.
Double space after the slug line. This separates the scene heading from the action that occurs within the scene.
Write the scene's narrative, which is what occurs in the scene. Begin at the page's left margin and continue across to the right margin. Single-space between the lines of each paragraph, and double-space between paragraphs. Describe the scene in the present tense, as if the reader were viewing it. For each character's first appearance in the screenplay, write the character's name in all capitals and give a concise description of the character.
Write the scene's action, as it unfolds, in the present tense. Use concise words and phrases, with visual flair to engage readers. Write sound effects in all capital letters, such as, "Monica's cell phone CHIRPS with a new text message."
Double-space after the action to show when a character speaks. Begin the character's name approximately 3 1/2 inches from the left edge. Write the name in all capital letters. Single-space after the character name.
Write any brief hints to the actor for delivering the dialogue in parentheses. Begin the hint 3.1 inches in from the left edge, and set its right margin 2.9 inches from the right edge. Single-space between the hint and the actual dialogue.
Write the character's dialogue, starting 2 1/2 inches from the left edge and continuing across the page to 2 1/2 inches from the right edge. Single-space the character's dialogue. Double-space between one character's dialogue and the next character's dialogue, and also between the dialogue and the narrative, when the action picks back up.
Double space at the end of the scene, before the next scene's slug line.