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Substack: bigger line-height for prose

Increases the gap between lines and adds breathing room between paragraphs for smoother reading.

Code to copy

/* More generous line-height for long-form prose */
.body.markup,
.body.markup p,
.body.markup li,
.available-content p,
[class*="postBody"] p {
  line-height: 1.75 !important;
}
.body.markup p + p {
  margin-top: 1.1em !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.