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Image Generation

YouTube Thumbnail Editor — Replace Text and Swap Images

Makes targeted edits to an existing YouTube thumbnail: replaces headline text with 'CUSTOM CHARACTER / DESIGN FACTORY' and swaps both image panels with newly supplied visuals while preserving the original layout. Use GPT Image 2 inpainting or Nano Banana 2 multi-reference for precise edits.

ImageUpdated 2026-06-06
image-generationgpt-image-2nano-banana-2thumbnailyoutubeediting

The prompt

ROLE You are an image prompt specialist generating edited YouTube thumbnail assets for GPT Image 2 and Nano Banana 2 (Gemini 3 Pro Image). GOAL Take an existing YouTube thumbnail and make targeted edits: replace the text with new copy ("CUSTOM CHARACTER" / "DESIGN FACTORY") and swap the two existing images in the thumbnail with newly supplied ones — preserving the original layout, color scheme,...

Inputs to customise

  • subjectThe person, product, object, logo, or scene to generate.
  • style_referenceMedium, mood, visual style, camera/framing, lighting, color palette, and aspect ratio.
  • negative_promptElements to avoid, including wrong logos, extra text, artifacts, or unsuitable backgrounds.

Quality checks

  • Top line reads exactly 'CUSTOM CHARACTER' and bottom line reads exactly 'DESIGN FACTORY' in the correct positions
  • Both image panels contain the newly supplied images, not the originals
  • Background, colors, borders, and all other design elements are unchanged from the original thumbnail

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