If you use a jigsaw blade with downward oriented teeth, you should place the boards with the face up. In this manner the saw won’t chip the edges and you will get proper cuts. If you have a blade with upward oriented teeth, you should place the laminate planks with the top-face down. Use a pull-bar to lock the laminate flooring boards to the rest of the rows. Check attentively the flooring and repeat the procedure if you identify gaps between the planks.