References are normally added while you drive the stage, with the Add reference button (6 on the navigation screen) or with the Rabbit Box remote's +10 button. But sometimes you need to add a reference between two that already exist, for example if you forgot a junction.
If you are stopped at the exact point of the reference, open the Reference Editor and tap the speedometer button (or the remote's yellow button). The reference takes the odometer distance and the GPS coordinates of that point.
A reference inserted by hand has no GPS coordinates: its location icon is shown in red. To set them by hand, hold the location icon for 1 second and type the latitude and the longitude.
If you hold the ⬆ or ⬇ arrows for 1 second, or use the Insert reference above and Insert reference below options in the ⬅ arrow menu, what gets inserted is a Regularity CP with the same distance and coordinates, not a reference. See Control Points (CPs).
Video tutorial: