(require 'smartrep)
(smartrep-define-key global-map "<f2>"
  '(("g" . text-scale-increase)
    ("l" . text-scale-decrease)))
(smartrep-define-key global-map "<f2>"
  '(("+" . text-scale-increase)
    ("-" . text-scale-decrease)))
;;; まだhydraではできない…
;; (hydra-create "<f2>"
;;   '(("g" text-scale-increase "zoom in")
;;     ("l" text-scale-decrease "zoom out")))
;; (hydra-create "<f2>"
;;   '(("+" text-scale-increase "zoom in")
;;     ("-" text-scale-decrease "zoom out")))