Autozoom
3D view in all Gps systems is quite fancy solution, but I must say it is not too practical with high speeds. Unfortunately Zumo has slow refresh rate and most of the time you'll pass the junction before you'll see it on the screen. Voice commands are helpful but not enough sometimes.
What I've noticed is, that there is an AutoZoom option when you are using standard 2D view. Depending on your speed the scale (zoom) of the map is changing. When you are getting to a junction or slip road, there is enlargement of the view (to make it clearer) and than back to large scale (small zoom)...
What a shame that it is not working for 3D view. It could go to 2D view with high speeds and than back to 3D when you are getting to roundabout or similar....
I haven't found any option where you can switch it on/off with 2D view so I'm guessing it must be a default setting...
Cheers
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