The CAESAR II input doesn't work with actual global coordinates, "delta dimensions are used instead.

The "Enter Global Coodinates" dialog allows you to define the real world coordinates for the starting node of each distinct (separate) section of piping (hopefully there is only one). This is used later in the software when determining elevations for environmental loads.

You can obtain "program generated coordinates" from the LIST facility. These coordinate values will reflect your input in the "Enter Global Coodinates" dialog. You can leave this LIST open and continue working, so you shouldn't have to "write things down".