Install: multimarkdown MacPorts sudo port install multimarkdown markdown-mode http://jblevins.org/projects/markdown-mode/ Install git clone git://jblevins.org/git/markdown-mode.git init.el (autoload 'markdown-mode "markdown-mode.el" "Major mode for editing Markdown files" t) (setq auto-mode-alist (cons '("\\.md" . markdown-mode) auto-mode-alist)) (defun markdown-custom () "markdown-mode-hook" (set