How to add top level cell in Koutline?

[Jean Louis]

 039. Title

    040. Title

       041. Title

          042. How can I add TOP level cell from this point? 



I use:  Editor:      GNU Emacs 28.0.50 (build 21, x86_64-pc-linux-gnu, X 
toolkit, cairo version 1.14.8, Xaw3d scroll bars)

        Hyperbole:   7.1.3
        Sys Type:    x86_64-pc-linux-gnu
        OS Type:     gnu/linux
        Window Sys:  x
        News Reader: Gnus v5.13

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Thanks,
Jean Louis
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