Tools Plot ELR Start by choosing the ELR you wish to work with from the drop down on the left of the toolbar. This will draw the path of the ELR on the map and create a table showing all the "track segments" and their mileages. A "track segment" is a contiguous section where the ELR and TrackID (TRID) are the same. Filter By TrackID You can now reduce the path shown on the map to a specific TRID. The list only shows valide TRIDs for this ELR. Locations The 'Locations' drop down shows all the key Locations along this ELR in ascending mileage order. If you select one there is a popup showing the possible LORs. If you click on the marker icon the Locations are plotted onto the map. Popups are available to show the name and mileage.