Can't change signature?

[AS1]

I set a signature in the past but now I'm unable to change it (option is not there). What's up with that?

 

[seasink]

Log in and click your name up at the top. The option is there. If you last set it a long while ago, it may have been affected by the change of the forum software.

 

[AS1]

I looked again. There's no option to change it.