You can't assign a draworder to a Point or Polyline, only Polygons have a draworder.
In most GPSr's you can change the zoomlevel from which you want to see Points and Polyline-labels on your map.
I don't remember if this can be done in Mobile XT too, it's years ago that I used it. Garmin stopped its development fairly early and I gave up using it because I didn't really like this 'unfinished Windows Mobile project'.
Bookmarks