to commonly asked questions.

My signature doesn't appear on my emails automatically.

My “signature”, to which we added the tagline today, is no longer appearing on my e-mails. I accessed the “Signature” under “Mail” but cannot figure out how to get it connected back to my gmail account. Help?

Here's how to assign a signature to an email account:

Select "All Signatures" on the left. Drag the signature listed in the middle column onto the account you'd like to use over on the left. Finally, select the account on the left column then select the signature from the drop down at the bottom near "Choose Signature".

This is poorly designed on Apple's part. Very unintuitive.
This image is a theme.plist hack