How do I add an email signature?

Instructions for Gmail (desktop)

1. Open Gmail.
2. In the top right, click Settings   See all settings.
   
3. In the “Signature” section, click + Create new and give your new signature a distinctive name and then click Create.
   
4. Create your personalized signature in the textbox provided.
5. Set your signature default for new emails by selecting the new signature from the drop-down menu. You can also optionally use the signature for replies or for forwarding.
6. At the bottom of the page, click Save Changes.