When I get on the freeway and go over 45mph, it zooms out to a huge degree, basically just showing the entire metro area. It doesn't show me where I am on the freeway at the time. If I slow down, then it will. How do I lock it into the mode where it shows me where I am despite my speed? Where's the screen where I can choose how I want to be routed? Ie, fastest route, shortest route, avoid highways, etc? TIA!