ShowTextBoundaries Property
True if dotted lines are displayed around page margins, text columns, objects, and frames in print layout view. Read/write Boolean.
expression.ShowTextBoundaries
expression Required. An expression that returns a View object.
Example
This example switches the active window to page view and displays text boundary lines.
With ActiveDocument.ActiveWindow.View
.Type = wdPrintView
.ShowTextBoundaries = True
End With