…align one crop mark to the crop mark on the opposite side (a straight line). With your non-dominant hand, apply pressure to the ruler and hold it in place – keep your fingers from the edge! With your dominant hand, align the xacto knife to edge of the ruler. Apply pressure to the knife and glide it down the edge of the ruler. (If your paper doesn’t cut, try again or change your blade.) *Some metal rulers come with cork…