the use of monofilament line to form a grid in the cross stitch fabric corresponding to the grid in a cross stitch pattern to facilitate the cross stitching process , after which the monofilament line can be easily removed by pulling from either end . the monofilament line has the distinct advantage of being resistant to piercing by the needle and cross stitch thread during the cross stitching process , and thus not being woven into the design as guide thread would do .