Add a signature (Android 2.3)
You can append one or a few lines of plain text to every message you send from your phone, such as your name, contact information, or even “Sent from my phone.”
This signature is independent of any signature you append to messages you send from Gmail on the web.
- Open your Inbox or another labeled list of conversations.
- Touch Menu > More > Settings > Signature.
- Enter a signature.
- Touch OK.