(define-key map "c" 'notmuch-show-toggle-citations-visible)
(define-key map "h" 'notmuch-show-toggle-headers-visible)
(define-key map "n" 'notmuch-show-next-message)
(define-key map "c" 'notmuch-show-toggle-citations-visible)
(define-key map "h" 'notmuch-show-toggle-headers-visible)
(define-key map "n" 'notmuch-show-next-message)