When I create a course in app, after selecting direct routing, the course should be a straight line linked two waypoint and sync as route, however it is still be snapped as a course or track.
I am using explorer 4.1.
My fault. I figured the logic now.
Originally I created the starting waypoint and the ending waypoint first, then select "direct routing" in option. I thought the app would change it to a straight-lined route.
The correct way is to first select direct routing in option before creating any waypoints.