The Cut last piece with the selected ones function allows you to cut a piece using another piece or an open contour. To cut a piece, the cutting pieces and the piece to be cut need to be overlapped. The first selected piece(s) is (are) the cutting piece(s), whereas the last piece of the selection is the piece to be cut.
When using the Cut last piece with the selected ones function, in the case of the graded pieces, the newly-created points have the grading rules resulted from the intersection of the contour graded on each size.