Changing Default Text Size for Messages and Signature (macOS)

<h2>Problem</h2><p>The user wants to change the default font size for composing emails and for the email signature in Airmail on macOS, but online guides do not match the current version of the app.</p><h2>Solution</h2><p>In Airmail for macOS:</p><ul><li>Go to <strong>Airmail Preferences → Appearance → Font Size and Preview</strong> to adjust the default font size for reading emails.</li><li>For the composer font, go to <strong>Preferences → Composer → Default Composer</strong> settings.</li><li>To change the signature font, go to <strong>Settings → Signatures</strong>, select the signature, and use the formatting toolbar to adjust font size.</li></ul><p>Note: After macOS updates, some settings locations may shift. If the settings don't match your version, try searching within Airmail Preferences.</p>

Updated on: 03/28/2026