AxisLabels (XLabels, Ylabels, and ZLabels)
Restores all hidden label value item(s) that are hidden through the HideSelection (Method) and FocusSelection (Method).
Expression.XLabels.UnhideAll()
An expression that unhides an AxisLabels item
This example shows how to unhide all label value items on the Xlabels:
ActiveDocument.Sections["AllChart"].XLabels.UnhideAll()