Creating a Username

Hello! I’ve been a forum user on other sites for over 15 years and have a USERNAME I’d like to use here as well. Somehow I signed up and my post shows my full first and last name rather than a username. How can I change that?
Thanks in advance.
Lugnutz (Jay Altemus)

 

Thanks for the reply, but I don’t understand.

 

Just click on @Ryan and start a conversation ( message ) with your problem.

 

Your answer will be seen after clicking on a red envelope, No answer will be a white envelope.

 

I think Ryan is on an island break. Not sure when he will be back to hold our hands.