So when I'm on navigation mode with my nuvi 3790 and then swipe my finger on the screen, it will show the map in bird's eye view (top view) but zoomed out where I cannot see properly the streets and it shows the whole route. This is not ideal for very long routes. This was not the case when I first got my unit (before upgrading to the latest firmware), before when I swipe my fingers on the screen it will go into bird's eye view mode but still zoomed in the street you are currently on. This will make it easy to scroll around the map in zoomed in view.

What am I missing here?

Thanks.