AI Poster Generator Tutorial: From One Sentence to a Finished Poster

The anatomy of a good poster

Posters are usually vertical 4:5 or 9:16 with strong vertical hierarchy: a headline at the top or bottom, the visual subject in the middle, and an info zone for time, venue, or CTA at the base.

Prompt ideas for three poster types

• Cinematic: "cinematic composition, dramatic lighting, single subject, title zone reserved at the top, vignette focus"
• Holiday: "festive atmosphere, warm bokeh, centered subject, celebratory but uncluttered"
• Promo: "high-contrast promotional visual, bold headline zone, space reserved at the bottom for price and CTA"

Generate and lay out

1. Pick the "Poster" scene with a 4:5 or 9:16 ratio.
2. Describe theme, mood, and where to leave whitespace.
3. Add headline, subhead, and CTA with the text overlay editor, keeping clear hierarchy.

Layout tips

• Separate headline, subhead, and CTA sizes decisively to create visual levels
• Keep important text inside the safe area, never over busy background detail
• Use your brand color for the CTA to guide action

To keep a poster series consistent, see brand visual consistency.

Start making

Open Peituka, choose the Poster scene, and turn one sentence into a finished poster base.