Resize preferences pane in Mail
My preferences pane in Mail is ridiculously wide and doesn't seem to be resizable. There are no resizing arrows in the bottom right corner - or anywhere else that I can see. I have dual monitors, and it spreads all the way across both. It seems to have started when I tried to import a signature that was too large. I have deleted the signature, but the pane has remained at that size. Is there any way to reset it as it is very annoying and difficult to use?