New maps may be added through the Edit menu. You can choose to add any of the predefined
maps available to the IDV or you can select a map file (e.g., a shape file) from the
file system.
The Edit->Save as the Default Map Preference menu item allows you to save the current
set of maps in a display as the default maps. When a new view window is created the maps that
are saved as the default are used as the background maps.
This list shows the set of currently loaded maps. In this list you can remove a map, change
its visibility, line width, style and color. The Fast Rendering button, when on,
can save on rendering time by not checking for projection seam crossings. Note: some maps
will display incorrectly when fast rendering is turned on.
These controls allow you to display latitude and longitude lines. You can set the visibility, spacing, line width, line style and color.
This slider allows you to set the vertical position of the maps.