Example. Fill in your details on the left.
- In Gmail, click the gear icon, then See all settings.
- On the General tab, scroll to Signature, click Create new and give it a name.
- Click in the signature box and paste (⌘V or Ctrl+V).
- Under Signature defaults, choose your new signature in For new emails use, and in On reply/forward use if you want it on replies too.
- Scroll to the bottom and click Save Changes.