From: ben.usenet@bsb.me.uk   
      
   Malcolm McLean  writes:   
      
   > You need two stacks because after a series of undos, you have a series   
   > of redos.   
      
   This is just a random observation that might trigger something useful in   
   more complex situations...   
      
   Emacs has what I find to be a very useful refinement of undo/redo: it   
   can be limited to a region of the text.   
      
   Say I delete most of the quoted material in a reply (Emacs is my Usenet   
   client), and then make a few remarks at the end of the post, maybe doing   
   some undo or redo operations.  If I now realise I need some of the stuff   
   I delete for context, I can highlight the top of my reply and undo in   
   the selected region only.  The big delete will be undone, and I can then   
   do the more selective editing I now know I need.   
      
   --   
   Ben.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)