As of Word 2013, the Save As command on the File tab (a.k.a. "Backstage") doesn't invoke the actual FileSaveAs command to get intercepted by a macro named FileSaveAs, although the F12 key still does. Of course, there's no way to force users to press F12
instead of clicking the File tab...
What you can do is create an event handler that fires on the DocumentBeforeSave event, which occurs regardless of which UI element is used.
In your template, insert a class module, and use the Properties pane in the macro editor to rename the class module as EventClassModule. Add this code to it:
Public WithEvents App As Word.Application
Private Sub App_DocumentBeforeSave(ByVal Doc As Document, _
SaveAsUI As Boolean, Cancel As Boolean)
On Error Resume Next
If SaveAsUI Then
Dialogs(wdDialogFileSummaryInfo).Show
End If
End Sub
Then insert a new regular module, and add this code to it:
Dim X As New EventClassModule
Sub AutoNew()
Set X.App = Word.Application
End Sub
Sub AutoOpen()
Set X.App = Word.Application
End Sub
Sub AutoClose()
Set X = Nothing
End Sub
The File Summary Info dialog will now be shown for either kind of Save As before the file is saved to disk, and anything entered in the dialog will be included in the saved file. (The If SaveAsUI statement prevents the dialog from appearing when the command
is Save instead of Save As. The first Save of a new document is executed as a Save As, so the dialog will appear then.)