How do I add different email signatures to different emails?

How do I add different email signatures to different emails?

I use the mail add-on to run 3 emails thru your CRM.  I can see how to change the default email signature but where do I go to add an email signature to the other 2 emails?

Each email is different so they need different signatures.

How do I do that?

Never mind.  I finally saw the little button on the email that says settings.  Your system isn't very intuitive.