This covers preparing a route for you to follow and saving your route to use later. How to follow your route, and then reverse your route if you want to retrace it back. Timeline:
0.41 Create a route: this sample- Bembridge to Brighton
2.16 Save your route
2.40 Clear your route from the screen
2.50 Load your saved route
3.15 Start FOLLOWING a loaded route. Status box will give ETA, distance , etc. information about routepoints
4.30 Stop FOLLOW when you arrive.
4.50 Reverse the route if returning the same way.