Vue d'Espirit only have one undo level, as does Carrara 1.0 for sure. Using pose dots sure could bring things back to a former posed state if you screwed up. I wish Poser 5 had multiple undos, but it doesn't and I'm skeptical if it will in the near future. As for a P6, who can say? Hopefully Daz Studio was have mulitple undos, if Daz has been listening to what Poser users want in an application they should include it. The basic Daz Studio is supposed to be free, but there will be modules added to functionality. I hope I won't have to buy a undo module when the program comes out.