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Substack: shrink oversized hero image

Caps the height of the giant hero image so you reach the start of the text sooner.

Code to copy

/* Force the oversized hero/title image down to a reasonable size */
.post-header .image-link img,
.post-header > img,
[class*="postHeader"] img:not([class*="avatar"]),
.cover-image img,
[class*="coverImage"] img {
  max-height: 280px !important;
  object-fit: cover !important;
  width: 100% !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.