The slide caliper is a measuring instrument with a scale and a cursor that drift into it. It was designed to take external linear dimensions, by contact between two opposing sides. With less accuracy, it also measures internal dimensions, depths, bumps, among other.
The scale of this virtual caliper is graduated in centimeters, which is divided into tenths (making the millimeter - 1mm). The pointer rotates once every millimeteris and the dial´s display is divided by one hundred (1/100), marking the 0.01mm (one hundredth of a millimeter).
horizontally drag and release the cursor
To zoom click in the magnifying glass "bottom of the simulator´s screen".