The Overview Map shows the full bounds of the loaded, visible data, with one or more view boundary displays shown (one for each 2D view.) The default style for the view boundaries are red outlines.
The Overview Map may be displayed or hidden using the View > Overview Map menu item or the Overview Map toolbar button on the File toolbar. It can also be enable from the Configuration Display Options.
The Overview Map is a separate window that can float or be docked.
The Overview Map has the following options: