It sounds like you are talking about POIs. At the moment, you can tap-and-hold any location on the map and add a POI for that waypoint. That POI goes into a database separate from the track and route. You can then tap-and-hold on that POI (at any time) and download a route to that POI. The functionality that isn't there, yet, is to export that POI data to a GPX file, or import POI data from a GPX file.