Scratch

It's just a fun thing to add a personal touch to each forum post. For example, mine is a blue-ish image that is easily recognisable and other scratchers can see that the post is by me without having to check my username. You can also put useful links as well as scratch projects you would like to advertise on your signature. You are still a new scratcher though, so you won't be able to have a signature. Keep scratching though, and you'll become a scratcher soon