The ItemFormatString property specifies the text of the label that is rendered inside of the chart. It can support any custom keywords (for example, <DATA_VALUE:#0.00>), or it may be a literal text string ("Hello").
Please consult the documentation topics on Labeling Concepts and String Formats for more information on applicable keywords.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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