One method:
- Make the HUD the Sensor of Interest;
- Set the CDU to Flight Plan;
- Use DMS Up/Down to cycle through the waypoints until you are at the first one (ie: #0 is where you took off from);
- The a box will be drawn around the waypoint 'location in space' or a tad pole will be drawn showing you which direction, how many degrees and what range the box is when it is off the HUD;