When this property is set to True, all E3Chart Pens are displayed on a Legend. The Pen's Visible property is ignored. When set to False, only Pens with their Visible property set to True are displayed. Example:

Sub CommandButton1_Click()
  Set E3Chart1 = Screen.Item("E3Chart1")
  E3Chart1.Legend.ShowAllPens = Not _
    E3Chart1.Legend.ShowAllPens
End Sub