;;; このときidoが使うwindowの高さは大きくした方がいい
(setq ido-max-window-height 0.75)
;;; あいまいマッチは入れておこう
(setq ido-enable-flex-matching t)
(ido-mode 1)
(ignore-errors
  (ido-vertical-mode 1)
  (setq ido-vertical-define-keys 'C-n-and-C-p-only))

(global-set-key (kbd "<f1> f") (with-ido-completion describe-function))
(global-set-key (kbd "<f1> v") (with-ido-completion describe-variable))
(global-set-key (kbd "<f2> i") (with-ido-completion info-lookup-symbol))