Waypoints are automatically added in an optimised order but you can still change the order manually if you need to. To change the order of waypoints, do the following:
You see a list of your waypoints.
You see a screen with the name of your waypoint at the top.
Your waypoint changes its position in the list and you are immediately returned to your list of waypoints.
Tip: You cannot move an unvisited waypoint into a list of already visited waypoints.