+*** Windmove Splitter
+
+Refer [[https://github.com/abo-abo/hydra/blob/master/hydra-examples.el][hydra-example]], to enlarge or shrink the windows splitter
+
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+
+ (defun hydra-move-splitter-left (arg)
+ "Move window splitter left."
+ (interactive "p")
+ (if (let ((windmove-wrap-around))
+ (windmove-find-other-window 'right))
+ (shrink-window-horizontally arg)
+ (enlarge-window-horizontally arg)))
+
+ (defun hydra-move-splitter-right (arg)
+ "Move window splitter right."
+ (interactive "p")
+ (if (let ((windmove-wrap-around))
+ (windmove-find-other-window 'right))
+ (enlarge-window-horizontally arg)
+ (shrink-window-horizontally arg)))
+
+ (defun hydra-move-splitter-up (arg)
+ "Move window splitter up."
+ (interactive "p")
+ (if (let ((windmove-wrap-around))
+ (windmove-find-other-window 'up))
+ (enlarge-window arg)
+ (shrink-window arg)))
+
+ (defun hydra-move-splitter-down (arg)
+ "Move window splitter down."
+ (interactive "p")
+ (if (let ((windmove-wrap-around))
+ (windmove-find-other-window 'up))
+ (shrink-window arg)
+ (enlarge-window arg)))
+
+#+END_SRC
+
+*** hydra misc
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (defhydra sd/hydra-misc (:color red :columns nil)
+ "Misc"
+ ("e" eshell "eshell" :exit t)
+ ("p" (lambda ()
+ (interactive)
+ (if (not (eq nil (get-buffer "*Packages*")))
+ (switch-to-buffer "*Packages*")
+ (package-list-packages)))
+ "list-package" :exit t)
+ ("g" magit-status "git-status" :exit t)
+ ("'" mode-line-other-buffer "last buffer" :exit t)
+ ("C-'" mode-line-other-buffer "last buffer" :exit t)
+ ("m" man "man" :exit t)
+ ("d" dired-jump "dired" :exit t)
+ ("b" ibuffer "ibuffer" :exit t)
+ ("q" nil "quit")
+ ("f" nil "quit"))
+
+ (global-set-key (kbd "C-'") 'sd/hydra-misc/body)
+#+END_SRC
+
+*** hydra launcher
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (defhydra sd/hydra-launcher (:color blue :columns 2)
+ "Launch"
+ ("e" emms "emms" :exit t)
+ ("q" nil "cancel"))
+#+END_SRC
+
+** Line Number
+Enable linum mode on programming modes
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (add-hook 'prog-mode-hook 'linum-mode)
+#+END_SRC
+
+Fix the font size of line number
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (defun fix-linum-size ()
+ (interactive)
+ (set-face-attribute 'linum nil :height 110))
+
+ (add-hook 'linum-mode-hook 'fix-linum-size)
+#+END_SRC
+
+I like [[https://github.com/coldnew/linum-relative][linum-relative]], just like the =set relativenumber= on =vim=
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package linum-relative
+ :ensure t
+ :init
+ (setq linum-relative-current-symbol "")
+ :config
+ (defun linum-new-mode ()
+ "If line numbers aren't displayed, then display them.
+ Otherwise, toggle between absolute and relative numbers."
+ (interactive)
+ (if linum-mode
+ (linum-relative-toggle)
+ (linum-mode 1)))
+
+ :bind
+ ("A-k" . linum-new-mode))
+
+ ;; auto enable linum-new-mode in programming modes
+ (add-hook 'prog-mode-hook 'linum-relative-mode)
+#+END_SRC
+
+** Save File Position
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (require 'saveplace)
+ (setq-default save-place t)
+ (setq save-place-forget-unreadable-files t)
+ (setq save-place-skip-check-regexp "\\`/\\(?:cdrom\\|floppy\\|mnt\\|/[0-9]\\|\\(?:[^@/:]*@\\)?[^@/:]*[^@/:.]:\\)")
+#+END_SRC
+
+** Multi-term
+define =multi-term= mapping to disable some mapping which is used globally.
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package multi-term
+ :ensure t)
+
+ (defun sd/term-mode-mapping ()
+ (mapcar #'(lambda (map)
+ (define-key map (kbd "C-o") nil)
+ (define-key map (kbd "C-g") nil))
+ (list term-mode-map
+ term-raw-map)))
+
+ (with-eval-after-load 'multi-term
+ (sd/term-mode-mapping))
+#+END_SRC
+
+** ace-link
+[[https://github.com/abo-abo/ace-link][ace-link]] is a package written by [[https://github.com/abo-abo][Oleh Krehel]]. It is convenient to jump to link in help mode, info-mode, etc
+Type =o= to go to the link
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package ace-link
+ :ensure t
+ :init
+ (ace-link-setup-default))
+#+END_SRC
+
+** Smart Parens
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package smartparens
+ :ensure t
+ :config
+ (progn
+ (require 'smartparens-config)
+ (add-hook 'prog-mode-hook 'smartparens-mode)))
+#+END_SRC
+
+** Ace-Windows
+[[https://github.com/abo-abo/ace-window][ace-window]]
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package ace-window
+ :ensure t
+ :defer t
+ ; :init
+ ; (global-set-key (kbd "M-o") 'ace-window)
+ :config
+ (setq aw-keys '(?a ?s ?d ?f ?j ?k ?l)))
+#+END_SRC
+
+** Which key
+[[https://github.com/justbur/emacs-which-key][which-key]] show the key bindings
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package which-key
+ :ensure t
+ :config
+ (which-key-mode))
+#+END_SRC
+
+** View only for some directory
+When see function by =C-h f=, and visit the source code, I would like the buffer is read only. See [[http://emacs.stackexchange.com/questions/3676/how-to-enter-view-only-mode-when-browsing-emacs-source-code-from-help/3681#3681][here]]
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (dir-locals-set-class-variables
+ 'emacs
+ '((nil . ((buffer-read-only . t)
+ (show-trailing-whitespace . nil)
+ (tab-width . 8)
+ (eval . (whitespace-mode -1))
+ ;; (eval . (when buffer-file-name
+ ;; (setq-local view-no-disable-on-exit t)
+ ;; (view-mode-enter)))
+ ))))
+
+ ;; (dir-locals-set-directory-class (expand-file-name "/usr/local/share/emacs") 'emacs)
+ (dir-locals-set-directory-class "/usr/local/Cellar/emacs" 'emacs)
+ ;; (dir-locals-set-directory-class "~/.emacs.d/elpa" 'emacs)
+ (dir-locals-set-directory-class "~/dotfiles/emacs.d/elpa" 'emacs)
+ (dir-locals-set-directory-class "~/dotfiles/emacs.d/el-get" 'emacs)
+
+ ;; temp-mode.el
+ ;; Temporary minor mode
+ ;; Main use is to enable it only in specific buffers to achieve the goal of
+ ;; buffer-specific keymaps
+
+ ;; (defvar sd/temp-mode-map (make-sparse-keymap)
+ ;; "Keymap while temp-mode is active.")
+
+ ;; ;;;###autoload
+ ;; (define-minor-mode sd/temp-mode
+ ;; "A temporary minor mode to be activated only specific to a buffer."
+ ;; nil
+ ;; :lighter " Temp"
+ ;; sd/temp-mode-map)
+
+ ;; (defun sd/temp-hook ()
+ ;; (if sd/temp-mode
+ ;; (progn
+ ;; (define-key sd/temp-mode-map (kbd "q") 'quit-window))))
+
+ ;; (add-hook 'lispy-mode-hook (lambda ()
+ ;; (sd/temp-hook)))
+#+END_SRC
+
+** Info plus
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (el-get-bundle info+
+ :url "https://raw.githubusercontent.com/emacsmirror/emacswiki.org/master/info+.el"
+ ;; (require 'info+)
+ )
+
+ (with-eval-after-load 'info
+ (require 'info+))
+#+END_SRC
+
+** advice info
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (defun sd/info-mode ()
+ (interactive)
+ (unless (equal major-mode 'Info-mode)
+ (unless (> (length (window-list)) 1)
+ (split-window-right))
+ (other-window 1)))
+
+ ;; open Info buffer in other window instead of current window
+ (defadvice info (before my-info (&optional file buf) activate)
+ (sd/info-mode))
+
+ (defadvice Info-exit (after my-info-exit activate)
+ (sd/delete-current-window))
+#+END_SRC
+
+** Demo It
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package org-tree-slide
+ :ensure t)
+#+END_SRC
+
+** Presentation
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package org-tree-slide
+ :ensure
+ :config
+ ;; (define-key org-mode-map "\C-ccp" 'org-tree-slide-mode)
+ (define-key org-tree-slide-mode-map (kbd "<ESC>") 'org-tree-slide-content)
+ (define-key org-tree-slide-mode-map (kbd "<SPACE>") 'org-tree-slide-move-next-tree)
+ (define-key org-tree-slide-mode-map [escape] 'org-tree-slide-move-previous-tree))
+#+END_SRC
+
+** pdf-tools
+#+BEGIN_SRC sh
+ brew install poppler
+#+END_SRC
+
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package pdf-tools
+ :ensure t
+ :init
+ ;; run to complete the installation
+ (pdf-tools-install)
+ :config
+ (add-to-list 'auto-mode-alist '("\.pdf$" . pdf-view-mode))
+ (add-hook 'pdf-outline-buffer-mode-hook #'sd/pdf-outline-map))
+
+ (defun sd/pdf-outline-map ()
+ "My keybindings in pdf-outline-map"
+ (interactive)
+ (define-key pdf-outline-buffer-mode-map (kbd "C-o") nil)
+ (define-key pdf-outline-buffer-mode-map (kbd "i") 'outline-toggle-children)
+ (define-key pdf-outline-buffer-mode-map (kbd "j") 'next-line)
+ (define-key pdf-outline-buffer-mode-map (kbd "k") 'previous-line))
+#+END_SRC
+
+** help-mode
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (defun sd/help-mode-hook ()
+ "Mapping for help mode"
+ (define-key help-mode-map "j" 'next-line)
+ (define-key help-mode-map "k" 'previous-line)
+ (define-key help-mode-map "h" 'forward-char)
+ (define-key help-mode-map "l" 'forward-char)
+ (define-key help-mode-map "H" 'describe-mode)
+ (define-key help-mode-map "v" 'recenter-top-bottom)
+ (define-key help-mode-map "i" 'forward-button)
+ (define-key help-mode-map "I" 'backward-button)
+ (define-key help-mode-map "o" 'ace-link-help))
+
+ (add-hook 'help-mode-hook 'sd/help-mode-hook)
+#+END_SRC
+
+** goto-last-change
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package goto-last-change
+ :ensure t)
+#+END_SRC
+
+** Ag
+install =ag=, =the-silver-searcher= by homebrew on mac
+#+BEGIN_SRC sh
+brew install the-silver-searcher
+#+END_SRC
+
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ (use-package ag
+ :ensure t)
+#+END_SRC
+
+** Local Variable hooks
+[[https://www.emacswiki.org/emacs/LocalVariables][LocalVariables]], use =hack-local-variables-hook=, run a hook to set local variable in mode hook
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+ ;; make Emacs run a new "local variables hook" for each major mode
+ (add-hook 'hack-local-variables-hook 'run-local-vars-mode-hook)
+
+ (defun run-local-vars-mode-hook ()
+ "Run a hook for the major-mode after the local variables have been processed."
+ (run-hooks (intern (concat (symbol-name major-mode) "-local-vars-hook"))))
+
+ ;; (add-hook 'c++-mode-local-vars-hook #'sd/c++-mode-local-vars)
+#+END_SRC
+
+** Table