Date: Apr 30, 2011 4:58 AM
Author: ברק שושני
Subject: Undo/Redo

This seems to be a recurring subject in this group.

Mathematica is now at version 8 and there's still no multiple undo and
redo functionality. I don't understand how such an amazing piece of
software can lack such a trivial feature. Why isn't Woflram doing
anything about it? Heck, I'll even write the code for undo/redo myself
for them for free if they let me. Is there someone at Wolfram I can
complain on the matter? Perhaps an internet petition is in order? What
do you think?