How to edit your signature?

Despite not being new to forums, I can’t seem to find where to edit/create a signature on this one. (I can see the option to include it in the Post Options, but I cannot find where to actually put something in it.)
Do I need to gain some rank first or am I just staring right past it?
Buccaneers vs Panthers

Create a signature -

1.Open a new message. …
2.On the E-mail Signature tab, click New.
3.Type a name for the signature, and then click OK.
4.In the Edit signature box, type the text that you want to include in the signature.

Nice post , thank you for sharing