Moves smoothly in increments you set for easy marking.

 Aunique optical instruments which reflect guidelines or other images onto any writing surface. These are indispensable when light boxes  or pencil lines cannot be used (paper too heavy for light box, too slick for erasing).  By drawing your own guidelines in white pencil on black paper you can have light lines reflected onto dark paper.  Reverse liner for use by lefties.  The small Phantom Liner comes with two lining guides for white paper, one for dark paper and one for writing on a curve.  The large Phantom Liner includes two 8.5x11" guidelines for white paper. Copy or cut Underliners to fit device.