Where do i put in signature for business email?

Both Yahoo! and Gmail have auto-signer. I use them. (Places formatted signature at end of email. End of email, if you're talking about where in the email. If you're talking about where in Yahoo! then it's Options tab at upper right, Compose thingie, second item down on resulting screen.
Where do i put in signature for business email?
do it like this








sincerely,


sign your name (with pen)


type your name
Reply:Goto the options in your yahoo mail click on edit signature