Navigating through completion possibilities with icomplete-vertical

Question

I am enabling icomplete-vertical and having difficulties about how to use it.

With the standard icomplete, I get the list of possible completions in the minibuffer and can navigate between the different completions with C-, and C-.

What is the procedure to navigate the completion possibilities with icomplete-vertical?

Answer 1

See C-h v icomplete-vertical-mode-minibuffer-map RET:

(defvar icomplete-vertical-mode-minibuffer-map
  (let ((map (make-sparse-keymap)))
    (define-key map (kbd "C-n")    #'icomplete-forward-completions)
    (define-key map (kbd "C-p")    #'icomplete-backward-completions)
    (define-key map (kbd "<down>") #'icomplete-forward-completions)
    (define-key map (kbd "<up>")   #'icomplete-backward-completions)
    (define-key map (kbd "M-<")    #'icomplete-vertical-goto-first)
    (define-key map (kbd "M->")    #'icomplete-vertical-goto-last)
    map)
  "Keymap used by `icomplete-vertical-mode' in the minibuffer.")

So, by default, either C-n and C-p or <down> and <up>.