Areas and features on the map can be examined in detail by using the Zoom In tool or the Zoom in Mode . The Zoom In tool reduces the extent by 50% around the center of the current extent.

The Zoom In Mode setting changes the behaviour of the mouse. When set to this mode the mouse can be used to drag a box across the screen identifying the limits of the new extent of interest. The Map Viewer will adjust the map extent to provide the minimal enclosure around the selection box. If the mouse is 'clicked' while in 'Zoom In Mode' the extent will be reduced by 50% around the area where the click occured.