What should you be able to see if the outside flat mirror are adjusted properly?

If the outside flat mirrors are adjusted properly, you should be able to see a clear and complete view of the area behind and to the sides of your vehicle. The mirrors should provide a wide angle of visibility, allowing you to detect other vehicles, pedestrians, or obstacles without significant blind spots. Ideally, the edges of the mirrors should frame your vehicle and show a portion of the lane beside you. This ensures safe lane changes and maneuvering.