To save your route as a .GPX file and export it, select the "Export GPX" option on the "Edit Route" pane:
It is also possible to import a .GPX file into eDofE Mapping by selecting "import GPX", clicking on "Choose File" then selecting the relevant map and clicking on "Open" then "Save".
At the moment, the maximum file size is 2MB or 3000 waypoints. if your .GPX file is larger than this, reduce the size by splitting the route into two or more files, or reduce the number of waypoints. Most GPX software packages have the ability to do this. GPX map files can only be viewed via a specialist mapping application.