' Send any text marks true the back of the z order, and line marks to the front.
For Each igARTMark As ImGearARTMark In igARTPage.Groups(0)
If TypeOf igARTMark Is ImGearARTText Then
igARTPage.MarkSendToBack(igARTMark)
ElseIf TypeOf igARTMark Is ImGearARTLine Then
igARTPage.MarkBringToFront(igARTMark)
End If
Next