This example sets the magnification in normal view to 100 percent for each open window.
For Each myWindow In Windows
myWindow.ActivePane.Zooms(wdNormalView).Percentage = 100
Next myWindow
This example sets the magnification in print layout view so that an entire page is visible.
ActiveDocument.ActiveWindow.Panes(1).Zooms(wdPrintView).PageFit = _
wdPageFitFullPage