By default, the OverviewShowSelectDates property is False. The OverviewShowSelectDates property specifies whether the selected dates are shown in the overview part of the control. The AllowSelectDate property indicates whether the user can select dates on the chart by clicking the its header. The OverviewVisible property specifies whether the chart's overview map is visible or hidden.  Use the OverviewShowMarkTimeZones property to specify whether zones marked by the MarkTimeZone method are shown in the overview part of the control.

The following screen shot shows the selected April 2006 zone on the overview map: