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Number each page in the upper right-hand corner; use 12 point Courier for your font.
Spacing: All screenplay page elements are single spaced; double space between elements (these include dialogue blocks, scene descriptions, and stage directions).
Margins: one inch top, right side, and bottom margins;
One and one-half inch left side margin.
Dialogue: begins two and one-half inches from the left edge (another one inch from the left margin); ends one inch from the right margin (two inches from the right edge of the sheet)
Center name of the person speaking in a dialogue block over their line (with their name in all CAPs)
Dialogue cues (in parenthesis) centered, directly below the name of the speaker
Sluglines: aligned left in ALL CAPS: For example,
INT. CLASSROOM – DAY
Screenplays begin with:
FADE IN:
And end with:
FADE OUT.