SmallChange Property
Returns or sets the amount that the scroll bar or spinner is incremented or decremented for a line scroll (when the user clicks an arrow). Read/write Long.
Example
This example creates a scroll bar and sets its linked cell, minimum, maximum, large change, and small change values.
Set sb = Worksheets(1).Shapes.AddFormControl(xlScrollBar, _
Left:=10, Top:=10, Width:=10, Height:=200)
With sb.ControlFormat
.LinkedCell = "D1"
.Max = 100
.Min = 0
.LargeChange = 10
.SmallChange = 2
End With