VIM Auto Complete Navigation

I've disabled the arrow keys on my .vimrc, but...

How do 开发者_开发问答I navigate up and down in autocomplete pop-ups? j and k doesn't work as I am in the Insert mode.

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You can use ctrl+n and ctrl+p (which are conveniently close to everything else). Incidentally, these also work in bash and other useful places, so are good to get used to.

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You may also like other popupmenu commands: http://vimdoc.sourceforge.net/htmldoc/insert.html#popupmenu-keys