Returns or sets the major unit for the specified axis. Use this property only with a value axis. Read/write Double.
expression.MajorUnit
expression Required. An expression that returns a ChAxis object.
Setting this property causes the HasAutoMajorUnit 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