Gmail

Add your signature

1. In Sigxel, click Copy signature.
2. Open Gmail in a desktop browser. Choose Settings → See all settings.
3. Under General, find Signature, create one, and enter a name.
4. Paste into the signature editor using normal paste.
5. Under Signature defaults, choose it for new emails and, if desired, replies and forwards.
6. Scroll to the bottom and choose Save Changes. Send a test message.

Gmail mobile apps have their own signature settings; do not assume desktop formatting carries over. If an image is missing, check its public URL. Keep the design compact: Gmail limits signatures to 10,000 characters, including formatting.

Source: Google's Gmail signature guide.