Apple Mail

Add your signature

1. Copy your finished signature in Sigxel.
2. Open Mail → Settings → Signatures on your Mac.
3. Select the email account, add a signature with +, and give it a name.
4. Disable Always match my default message font to preserve the chosen font.
5. Replace the placeholder text with your copied signature.
6. Set Choose Signature for the selected account. Compose a test message.

If you created it under All Signatures, drag it to your email account before using it. Images or spacing may be adjusted by Mail; check a sent message as well as the composer.

This guide is for the Mac app. iCloud Mail in a browser has different capabilities.

Source: Apple Mail signature settings.