You should be able to edit your signature with no problem. If you can't see the buttons, try changing the skin you are using. If you use Chrome or Firefox, recent updates have made some buttons go missing.
So, if you can't find your control panel, change your skin.
I'm just lookin' for clues at the scene of the crime.
"The urge to save humanity is almost always only a false-face for the urge to rule it"