Substack Cover Image Safe-Zone Prompt

Substack cover images look great in one spot, then get cropped, blurred, or butchered everywhere else. The feed crops them one way. The email header crops them another. The share card does its own thing. This prompt fixes that. We give ChatGPT Images 2.0 the exact safe-zone coordinates so every key element lands inside a centered rectangle that survives all major placements. Title on the left, subject on the right, face parked between two fixed lines. Build the cover once. It holds up cropped or full size.

Works with

ChatGPT
ChatGPT Images 2.0

Prompt / skill content

Create a Substack post cover image. Canvas: 1200 x 630 px, landscape orientation.
 
Keep ALL key visual elements, text, faces, logos, central subject, inside a centered 345 x 195 px zone on the canvas:
Left edge: 427 px from the left
Right edge: 772 px from the left
Top edge: 217 px from the top
Bottom edge: 412 px from the top
 
Outside this zone: background fills, brand color, atmosphere, and decorative elements only. Nothing important lives in the outer areas.
 
Composition split:
Title or key text: LEFT of center (x 427 to 600)
Character or focal subject: RIGHT of center (x 600 to 772)
Character's face or highest point: at approximately y 250 to 330
 
Do not place any text inside the image.
 
Style: [your style, e.g. fashion illustration, flat editorial, bold graphic design]
Subject: [describe what the image should show]
Color palette: [your brand colors]
 
The image must look intentional at full size AND when cropped to only the center 345 x 195 px rectangle.