 
   ;; F4
   (general-define-key
-   :states '(normal visual insert emacs)
    :prefix "<f4>"
     "a"     #'helm-apropos
     "b"     #'helm-all-mark-rings


  ;; F5
  (general-define-key
   :states '(normal visual insert emacs)
   :prefix "<f5>"
    "f"      #'toggle-frame-fullscreen
    "h"      #'global-hl-line-mode


  ;; F6
  (general-define-key
   :prefix "<f6>"
    "c"     #'rtags-rename-symbol
    "d"     #'me:tags-find-symbol
