holensum,
At the top in the brown color section, you will see Forum Actions which is under the word Chat in the black color section. Click on Forum Actions and then click on "Edit Profile" and when that screen comes up, look down the menus on the left hand side and you will see one that states, "Edit Signature". Click on it and you will be able to make the changes to your signature line.
Hope that is what you are looking for and my directions are clear.
Warren
Fly fishing and fly tying are two things that I do, and when I am doing them, they are the only 2 things I think about. They clear my mind.