If you know how to make your own toolmenu, you can use this macro:

Sub Makro1()
With ActiveWindow.ActivePane.View.Zoom
.PageFit = wdPageFitFullPage
.Percentage = 25
.PageFit = wdPageFitNone
End With
End Sub

"Jeff" skrev:

Hello and thank you for your help. I have tried what you are suggesting and
Word does as you saw, it only allows certain zoom values when you view one
page. When I zoom to 80%, for example and then click on "view one page", it
changes my zoom to 71% to fit the one page in the screen. When I click on
the + button, the zoom does increase, but I only have the option of seeing
two pages. Clicking on the “one page” button again returns my zoom to 71%.

Word seems to act differently on different monitors. On my laptop I have a
choice of either 71% or 100% if I want to see one page only. Any zoom value
in between gives me two pages on the screen. This does not happen on my
desktop. Word must be aware of the monitor width and the default appears to
be to show as many pages as possible for a given zoom. I would very much
like to turn this “helpful” option off. Thank you.