To set waypoints to follow in the car I use the Tesla web browser and set
A Better Routeplanner as a favorite. Then I set a non-linked ID/PW combination to remember routes between my tablet and car.
Then I explore routes on the tablet, charging points and different roads. When I like a choice, I save it on the tablet and recall it in the car for use.
To get the battery supercharger warming prep, I then use the Tesla navigation for each segment.
It makes for fun planning to set the arriving battery charge, for local driving, and to see charge times needed at Superchargers. With Tesla charging speeds increasing, the predicted times are too long, but the predicted charge amounts are correct.
I even adjust the watts per mile to see how driving a higher speeds affects the battery use. The settings in the routeplanner (ABRT) are useful.
It’s fun.