I just noticed a bug on the 830. If you have a course longer than 100 miles or 100km and you zoom all the way out on the elevation screen then you can no longer zoom back in again. This bug existed on the 1030 previously and was fixed in firmware 7.00.
from the Edge 1030 7.00 release notes
- Fixed elevation zooming issue with large courses/activities/segments (>100mi or km).