'Declaration Public Property ShowOutlineSymbols As Boolean
public bool ShowOutlineSymbols {get; set;}
If the outline symbols are displayed, they provide a visual representation of the outline levels or rows and columns in Microsoft Excel. In addition, the outline symbols include the expansion indicators which allow for the expanding and collapsing of outline groups.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2