Document Template question

I am trying to understand how the Document Template mechanism works in MFC.
The following is boilerplate code generated by the App. Wizard, comments
are mine:

BOOL CTextEditorApp::InitInstance()
{
        ...
        // Create instance of CSingleDocTemplate on the heap and pass
        // its pointer to AddDocTemplate.
  
    CSingleDocTemplate* pDocTemplate;
    pDocTemplate = new CSingleDocTemplate(
        IDR_MAINFRAME,
        RUNTIME_CLASS(CTextEditorDoc),
        RUNTIME_CLASS(CMainFrame),
        RUNTIME_CLASS(CTextEditorView));
        ...
    AddDocTemplate(pDocTemplate);
        ...
}

What I don't understand above: If the class had been created on the stack
(without using "new"), I assume this would not have worked, as the instance
of CSingleDocTemplate would have gone out of scope at the end of
InitInstance() and the pointer would be left dangling. Yet there is
nothing in the MSDN page for AddDocTemplate() that says the instance of the
CSingleDocTemplate needs to be created on the heap. Is it poor
documentation, or does AddDocTemplate() make a full copy of the object
first?

Thank you in advance.

-Sabuncu