Abstract: A tape measure includes a casing containing a conventional tape with a hook on its outer end and a return spring. A magnifying lens is mounted in a front end of the casing above the tape with an indicator line on the bottom of the lens extending transversely of the tape. An LED in one side of the casing illuminates the lens and the area therebeneath. A marker is slidable in the lens beside the tape and aligned with the indicator line. A slider, which can be operated with a thumb, turns on the LED and then pushes the marker against a workpiece. When the slider is released, a spring returns the marker to the rest or non-use position and the LED is turned off by the slider.