Application.NewWindow (Word)

Opens a new window with the same document as the specified window. Returns a Window object.

A colon (:) and a number appear in the window caption when more than one window is open for a document. If the NewWindow method is used with the Application object, a new window is opened for the active window. The following two instructions are functionally equivalent.

Set myWindow = ActiveDocument.ActiveWindow.NewWindow 
Set myWindow = NewWindow