Magnifying ruler is designed for use with computer printouts. Center section isolates and magnifies one line at a time. One edge of the ruler is ruled in a 1/16" scale, and the other edge is scaled in centimeters. The magnified portion is ruled in 1/16" on one side and 1/10" on the other. Scales correlate with horizontal and vertical printout columns. Numerals and graduations are sharply delineated.