AFAIK Alt 0151 is the correct stroke for an em dash and I have no idea how
it could cause anything to disappear from the menu. I have a feeling that it
may have been coincidental & that there must be more to the issue. However,
you've posted to the group for Word on the Mac. Although many of the
regulars here know the program well on both systems technical issues are
considerably different so you'll be better off asking in one of the Windows
groups for Word - but make sure to specify your exact Office update level &
your version of Windows when you do. Start from here:
http://www.microsoft.com/office/community/en-us/FlyoutOverview.mspx
Before doing so you might try using Tools> Customize, select the Menu Bar by
clicking its *name* on the Toolbars page & clicking the Reset button. If
that doesn't correct it you can use the Commands page of that same dialog
to select File from the Categories list & drag a fresh copy of the save
command up into the File Menu or drag the File menu from the menu bar then
from the Built-in Menus category drag a fresh File menu up to replace it.
HTH |:>)
Bob Jones
[MVP] Office:Mac