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Gmail: larger message font

Bumps the open message text to 16px with looser line spacing to ease long reading sessions.

Code to copy

/* Larger, more comfortable message text */
.a3s.aiL, .ii.gt div {
  font-size: 16px !important;
  line-height: 1.6 !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.