Chart.ShowDataLabelsOverMaximum (Word)

Returns or sets a value that indicates whether to show the data labels when the value is greater than the maximum value on the value axis.

If you change the value axis in such a way that it becomes smaller than the size of the data points, you can use this property to set a value that indicates whether to show the data labels. This property applies to 2D charts only.

ActiveDocument.Background.Chart.ShowDataLabelsOverMaximum = True