Returns or sets the minor unit for the specified axis. Use this property only with a value axis. Read/write Double.
expression.MinorUnit
expression Required. An expression that returns a ChAxis object.
Setting this property causes the HasAutoMinorUnit property to be set to False.
This example sets the major and minor unit for the value axis.
Sub SetValueAxis()
Dim chConstants
Dim axValueAxis
Set chConstants = ChartSpace1.Constants
Set axValueAxis = ChartSpace1.Charts(0).Axes(chConstants.chAxisPositionValue)
axValueAxis.MajorUnit = 7
axValueAxis.MinorUnit = 2.5
End Sub