How to?Add Signature

How does one add a signature to their post? I see the Add Signature is checked when creating post.
I wanna have something like BradH

In the upper right side of your screen, where you see your username click on it. It will pulldown a list, click "update user profile", go all the way to the bottom. Input what you want. As you update it it will promt you to answer a few questions. Once done it will show on your next post.

Thank You.That was easy. I seem to remember a different /more complex method long ago.