Can't undo warning?

I may have overlooked this feature, and if not, it would bean enhansement request.

There are a number of edits which can't be undone. The challenge isknowing what they are. Perhaps SW can modify those edits to give awarning box. "This operation cannot be undone. Proceed? y/n"

I just found that dragging parts into an existing sub-assemblycannot be undone. It is a fairly complex model, with a lot of theparts just having a number, so it is not that easy to manually pickout the parts to undo the operation by hand.

Joe DunfeeSolidworksGeneral