{Lightwave modeller has over a dozen undo steps.} Just a slight correction: Lightwave has a user-defined-number of steps. The best is about 64, but you can set it to 128 or 256 if you really want that many undos. Photoshop has a History pallette with user-defined number of steps. So, no, there is no excuse that "undo takes up memory". The user should be able to set the number of undos to work the best on their system: 64 to 128 levels for machines with a lot of memory, 8 levels for lower machines. Poser's lack of undo is simply another example of sloppy programming... and something that wasn't fixed in P5 (Can you imagine how powerful this feature would be if you could undo a MAT pose and restore the original textures?) Some workarounds: Pose a figure the way you like it. Before applying a new pose. Go to Edit, then Figure, then Memorize Figure. This will save the pose to memory. When a pose messes up your character, go back to Edit, then Figure, then Restore Figure. Or, if you're working with a number of objects in the scene, simply follow the above advice and save often. If your image is for "production", most definitely save often.