Oh, and as to your specific question, I found this on this post:
Selecting ‘Airstart’ now specifies where you will start, and the waypoint lines up to Waypoint 1 or the specific start waypoint are removed.
Oh, and as to your specific question, I found this on this post:
Selecting ‘Airstart’ now specifies where you will start, and the waypoint lines up to Waypoint 1 or the specific start waypoint are removed.