How to Generate Readable Text on AI Posters and Banners

Updated November 1, 2026

AI-generated posters can contain attractive visuals but misspell the headline. To reduce lettering errors, give the image model a short, exact phrase, specify its placement, and check the result before publishing.

Plan the text and format

Choose one headline and, if needed, one short supporting line. Prepare the final spelling, capitalization, punctuation, and brand name before generating. Short phrases are generally easier to render accurately than paragraphs.

Pick an aspect ratio for the intended placement:

• 1:1: Square social posts and general-purpose graphics.
• 4:5: Portrait feed posts with more room for a headline.
• 9:16: Vertical stories, reels, and mobile-first posters.

Keep important text away from the edges, especially on 9:16 layouts where platform controls may cover parts of the image. Specify a high-contrast combination, such as dark lettering on a light background, and leave open space around the copy.

Generate a poster in Oranzy

1. Sign up for 100 bonus tokens, then open Oranzy. Choose an image model such as Ideogram V4, Imagen 4, or GPT Image 2.5.
2. Set the aspect ratio for your placement. Start with 4:5 for a feed poster, 1:1 for a square graphic, or 9:16 for a story.
3. Write a prompt that describes the visual, quotes the exact text, and specifies the typography and placement. For example:

Create a 4:5 poster for a spring plant sale. Use a pale cream background, a single green monstera leaf, and a clean editorial layout. At the top, display the exact headline "SPRING PLANT SALE" in large, bold, dark green sans-serif letters. Below it, display "MAY 18–19" in smaller dark green letters. Keep all text legible, with generous spacing and no additional words.

1. Generate an image and inspect it at full size. Read every letter and number, then check contrast, spacing, and cropping. If the text is wrong, simplify the copy or adjust the prompt before generating another version.

Refine the layout and lettering

Change one instruction at a time so you can tell what improved the result. For example, first remove the supporting line; if the headline becomes accurate, try adding the line back with a clear placement instruction. You can also test the same prompt with another available model.

If the visual is strong but a word is still wrong, consider keeping the image and adding the final text in a separate design editor. This is often more reliable for prices, legal copy, URLs, and exact brand names. Export the finished design at a suitable resolution for its destination and check the actual platform preview before publishing.

Avoid common mistakes and wasted generations

• Too much copy: Start with a headline rather than a full advertisement. Add detailed copy during final layout if necessary.
• Unclear text instructions: Put each required phrase in quotation marks and identify it as a headline or supporting line. State that no extra words should appear.
• Conflicting styles: Avoid requesting both ornate lettering and maximum readability. Ask for a simple, bold type style first.
• Poor contrast or crowded composition: Specify the text color, background color, and empty space around the text.
• Skipping proofreading: Zoom in and compare the image against your source copy. Check dates, punctuation, and repeated letters; a good-looking image can still contain an error.
• Changing everything at once: Keep a copy of the prompt and revise one element per attempt instead of generating many unrelated versions.