To edit an existing signature or create a new one in Outlook:

  1. Click File / Options
  2. Click Mail.
  3. In the “Compose messages” section, click the Signatures button.
  4. Select signature to edit and click Save, or
  5. Click the New button, enter a name for the signature and click OK.
  6. With the new signature selected, create the content for the signature and click Save.
  7. In the “Choose default signature” section, select your email account and assign a signature for new messages and replies/forwards.
  8. Click the OK button.
  9. Click the OK button to close the Options window.