By default the work location and the machine home location are the same point. NCPlot allows you to set a work location just like you would on the machine. This let's you see your tool motion back to home. To set work locations, go to the "Setup" menu and click "Machine Configuration". Then click "Work Offsets" and fill in values for the X and Z offsets. Then click "Apply" or "OK" to see your changes. Also remember to save the configuration to keep these changes.