While I don't have P5, I have certainly found that the ALLEGED undo feature of P4 is a major farce. At least 9 times out of 10 that I have tried to undo ANYTHING, nothing happens. It's so unpredictable and generally uncooperative that I have resigned myself that there simply is NO actual undo in Poser (not even one fully functional level, in any case). Now I hear that P5 is no better. It seems to me this is one of those BUGS that was carried wholesale from P4 to P5 with absolutely no attempt to fix it at all. THIS is "taking time to do it right??"