The system provides a simple measurement of object size using electronic scales on a screen, in a modular setup. 

A display module features a ruler function that allows users to measure the length or distance between points on the screen. A ruler’s primary function is to measure length. It typically has a straight edge with markings (usually in centimeters or inches) that allow you to determine the distance between two points accurately. 

The display displays a ruler overlay with clear markings for measurement units, which can be calibrated by adjusting its scale. The user places the ruler overlay over the object or image they want to measure, and the display reads the measured length or distance. The ruler function can be implemented using software, a touchscreen, or calibration data. This versatile tool can be used for various tasks like design, drafting, or image editing..