You can find the Delete manual modification for points function in the Shape working mode. The function can be applied in steps or by selecting the point and, then, the function. If the function is applied on the size the contour modification was carried on, then all the gradings will take over the modification undertaken on the base size. If the function is applied on a size different from the size the piece contour modification was carried on, the contour modification is lost on the size it was carried on.