Document.IsInAutosave (Word)

Returns False if the most recent firing of the Application.DocumentBeforeSave event (Word) event was the result of a manual save by the user, and not an automatic save.

The IsInAutosave property is designed to be used in an event handler for the Application.DocumentBeforeSave event. Using it for other purposes is not recommended.

If Word.ActiveDocument.IsInAutosave = False Then
   Debug.Print "Manual save."
Else
   Debug.Print "Automatic save."
End If