Understanding Pan and Zoom Actions
Pan and zoom uses the same technique as many other widely available online Map applications.
To pan the Map, click and hold the left mouse button, then drag the mouse pointer to a new position.
To zoom the Map, roll the mouse wheel away from you to zoom in or toward you to zoom out.
To zoom to show an area of the map, click and hold the middle mouse button, then drag to define the area you wish to view, then release the mouse button. This will zoom in and pan to center the area at the highest zoom possible that can show the requested area of the map.