It is true, and a very requested feature from everyone I have talked with. Starting in NX4 there is a redo function. It is only available in Sketcher at this time, but this hopefully will be a feature that is propogated throughout every module, application in NX. I still believe to this day there was an Redo feature in the Unigraphics 10 days, precisely 10.4.3. Also 10 and 11 of Unigraphics was the only version to create a scheme change version (the second version number). There may have been a pre version 10 of Unigraphics to do this but I’m talking about the modern Unigraphics. Off subject but thought it may be usefull information to know. I could be wrong about the whole version 10.4.3 having a redo, and in fact there is only one other person that I know that thinks the same thing. Regardless it is here now.
Enjoy the Redo.