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Outlook: comfortable reading width

Limits the email body to about 760 pixels wide and centers it for comfortable reading.

Code to copy

/* Constrain the email body to a comfortable reading width */
div[aria-label="Message body"],
div[aria-label="Treść wiadomości"] {
  max-width: 760px !important;
  margin-left: auto !important;
  margin-right: auto !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.