How do I edit a route, created in MyDrive, while on the road using the navigator only?

BearLeft Registered Users Posts: 2
New Seeker
I plan all of my routes using the MyDrive web app on a computer and sync with the device. According to the Rider 550 owner's manual, I should be able to edit these routes on the fly using the "Current Track" menu on the device. But the only option that comes up is to "Delete Current Track." The editing buttons shown in the owner's manual do not appear.