On older units, The Edge 800 and 810, when navigating a course if you went off course the screen dimmed and a large "off course" warning was displayed. Once you acknolodged it, the screen went back to whatever it was doing and the off course warning moved to the top or bottom. On the Edge530 when I go off course the notification is at the bottom of the screen which is much less obvious. It was nice that it took over the screen until the warning was dismissed. Maybe this is a difference between the 500 series and the 800 series but if not, please bring back the old behavior, it was useful.