Group Separator
The Group Separator bars are painted when the scheduler’s appointments are grouped either by resource or by date, as specified by the SchedulerControl.GroupType and SchedulerViewBase.GroupType properties.
The group separator in the view, grouped by resource, is shown in the picture below.
When the scheduler view is grouped by date, the common look of the group separators is illustrated in the following picture:
The width of this element is specified via the SchedulerViewBase.GroupSeparatorWidth property.