To add a waypoint to a route, you need to set up a route with both the start point and endpoint.
1. On the route selection screen, select Add Stop +.
2. You may then select a waypoint using the search bar / from the map / from the search history → select the desired option → to select the desired location → Add to route
3. The route will be recalculated to include the waypoint. (you can adjust the order of waypoints by moving the address boxes with the right edge)