Deleting mistakes

I'm new to Squeak, so please bear with me.  I'm doing the Magritte  
Tutorial and have accidently created a class method that I misnamed.   
How can I delete a class method?  I don't find this in any of the  
documentation or the White book.
Also, how do I properly classify methods when adding them?  (i.e.  
proper selection in pane left of method listing).
Thank you very much for your assistance.

Jim Norman