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I have setup my Vim Help to appear as a listed buffer for my ease of quick access and return to same page. The problem I face is that every time I jump around in Vim Help page using Ctrl-] a new Vim-Help-page-buffer is created, which is not what I want.

Is there a way to disable Vim from creating a new buffer every time I jump to a hyperlinked page within Vim Help pages?

Or else perhaps, is it possible to have the opening of a Vim-Help-hyperlinked-page to automatically trigger the deletion of the previous Vim-Help buffer? How could this be scripted?

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    It may be easier to let the help buffer unlisted, and use :ls! and :buffer <number> to jump to an existing help buffer instead.
    – VanLaser
    Oct 6 '15 at 13:39
  • Thanks, but choose not this way bec. want to have help listed.
    – Annis Monadjem
    Oct 7 '15 at 1:18
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Well, I decided to answer my own question: 

autocmd BufEnter,BufWinEnter * if &filetype=='help' 
        \| let w:bufnuc = bufnr("%")
        \| let w:bufnua = bufnr("#")
        \| if w:bufnua > 0
            \| execute "buffer " . w:bufnua
                \| if &filetype=='help' 
                    \| if w:bufnua != w:bufnuc
                        \| set nobuflisted
                    \| endif
                \| endif 
            \| execute "buffer " . w:bufnuc
        \| endif
    \| endif

It works as per spec's above.

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