Here's a problem I get myself into all too frequently. Suppose you apply a pose, MAT or a motion(BVH) to a figure and then change your mind. Clicking Edit/Undo won't work because "Undo" is grayed out, meaning the Undo command isn't available for the unwanted change you just made. To avoid this, I can just save my work before applying something that can't be undone. If, however, there is a way to undo unwanted changes, I'd be grateful to anyone who will share it with me. Thanks!