Use the DividerLine / DividerLineAlignment property to define the line that underlines the divider item. A divider item uses the item's client area to display a single cell. The Divider property specifies the index of the cell being displayed. In other words, the divider item merges the item cells into a single cell. Use the Selectable property to specify the user can select an item. A divider item has sense for a control with multiple columns.