Customize Markdown and Org-Mode Font Faces on Aquamacs Emacs

init.el

;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Customize Font Faces
;; http://www.emacswiki.org/emacs/CustomizingFaces
(custom-set-faces
  ;; Your init file should contain only one such instance.
  ;; If there is more than one, they won't work right.
 '(markdown-header-face-1 ((t (:inherit markdown-header-face :height 2.2))))
 '(markdown-header-face-2 ((t (:inherit markdown-header-face :height 1.7))))
 '(markdown-header-face-3 ((t (:inherit markdown-header-face :height 1.3))))
 '(org-level-1 ((t (:inherit org-level-1 :height 1.5))))
 '(org-level-2 ((t (:inherit org-level-2 :height 1.3))))
)