- Open the Outlook application on your Mac.
- Click on Outlook in the top left corner of the toolbar, then select Settings... .
- In the Settings window, click on Signatures, and then click on the plus button to add a new signature.
- Start by giving your signature a suitable name. Then enter your desired signature(s). Then press the Save button and close the window.
- Choose which Account you want to use the signature for, and whether it should be for New messages and/or also for Replies/Forwards.