1.Go to the signature you want.Below each signature is a textbox with the entire html codes for the signature.Put the blinking cursor in the textbox.
2.Press the cmd button and the a button at the same time. (This is cut)
3.Press the cmd button and c at the same time. (This is copy)
4.Go to your settings .Click on signature.Place the
blinking cursor in the signature box.
5.Press cmd and v at the same time. (This is pasting)
6.Remove all empty spaces be fore the < html.This can be done by placing the cursor before the < symbol and pressing delete 5 times.
7.Scroll down and click on done.
8.You now have a signature on your email.
Places that have a little more information are: