ChartGroup.SplitType (Word)

Returns or sets the way the two sections of either a pie-of-pie chart or a bar-of-pie chart are split. Possible return values are xlSplitByCustomSplit - The second chart displays arbitrary slides, xlSplitByPercentValue - The second chart displays values less than a percentage of the total value. The percentage is specified by the SplitValue property, xlSplitByPosition - The second chart displays the smallest values in the data series. The number of values to display is specified by the SplitValue property, xlSplitByValue - The second chart displays values less than the value specified by the SplitValue property.

With ActiveDocument.InlineShapes(1) 
 If .HasChart Then 
 With .Chart.ChartGroups(1) 
 .SplitType = xlSplitByValue 
 .SplitValue = 10 
 .VaryByCategories = True 
 End With 
 End If 
End With