This document outlines requirements for redesigning a CASE tool software design editing tool to include a grid display. It specifies that the grid can be turned on or off via the control panel in either centimeters or inches. It also lists non-functional requirements like ensuring the grid is reliably displayed. Functional requirements are defined mathematically, including that the grid is switched on when the software is on and off when it is off, and that providing viewers will passively display the grid for the user.