About moving around the map
There are several ways that you can navigate the map to get the view that you need. You can use your mouse, keyboard, and several navigational tools to change the map viewing area as well as the altitude, or zoom level, at which the map is displayed.
More information
Zoom in or out using the Location and Scale toolbar
Change map view using Back and Forward
Zoom and move the map by using the Microsoft IntelliMouse pointing device