By default, the Count property is 1. The Count property specifies the number of units being displayed in the level. The Unit property specifies the unit being used to display labels in the level. Use the Label property to assign a caption for the level. Use the NextDate property to get the next date. Use the Zoom method to zoom the chart to a specified interval of dates. Use the FormatDate property to format a date to a specified format.

The following screen shot shows a header that displays the dates from 3 by 3 days :