       :bind (:map modi-mode-map
              ("C-c H" . htmlize-r2f)))
 
+;;; Include src lines
+    ;; Auto-update line numbers for source code includes when saving org files.
+    (use-package org-include-src-lines
+      :load-path "elisp/org-include-src-lines"
+      :config
+      (progn
+        ;; Execute `endless/org-include-update' before saving the file.
+        (defun modi/org-include-update-before-save ()
+          "Execute `endless/org-include-update' just before saving the file."
+          (add-hook 'before-save-hook #'endless/org-include-update nil :local))
+        (add-hook 'org-mode-hook #'modi/org-include-update-before-save)))
+
+;;; Convert included pdf to image
+    ;; Replace included pdf files with images when saving org files.
+    (use-package org-include-img-from-pdf
+      :load-path "elisp/org-include-img-from-pdf"
+      :config
+      (progn
+        ;; ;; Execute `modi/org-include-img-from-pdf' before saving the file.
+        ;; (defun modi/org-include-img-from-pdf-before-save ()
+        ;;   "Execute `modi/org-include-img-from-pdf' just before saving the file."
+        ;;   (add-hook 'before-save-hook #'modi/org-include-img-from-pdf nil :local))
+        ;; (add-hook 'org-mode-hook #'modi/org-include-img-from-pdf-before-save)
+        ;; Execute `modi/org-include-img-from-pdf' before exporting.
+        (with-eval-after-load 'ox
+          (add-hook 'org-export-before-processing-hook #'modi/org-include-img-from-pdf))))
+
+;;; Extract image from included .zip
+    ;; Auto extract images from zip files when saving org files.
+    (use-package org-include-img-from-archive
+      :load-path "elisp/org-include-img-from-archive"
+      :config
+      (progn
+        ;; ;; Execute `modi/org-include-img-from-archive' before saving the file.
+        ;; (defun modi/org-include-img-from-archive-before-save ()
+        ;;   "Execute `modi/org-include-img-from-archive' just before saving the file."
+        ;;   (add-hook 'before-save-hook #'modi/org-include-img-from-archive nil :local))
+        ;; (add-hook 'org-mode-hook #'modi/org-include-img-from-archive-before-save)
+        ;; Execute `modi/org-include-img-from-archive' before exporting.
+        (with-eval-after-load 'ox
+          (add-hook 'org-export-before-processing-hook #'modi/org-include-img-from-archive))))
+
 ;;; Org Export
     (use-package ox
       :defer t

;; Time-stamp: <2016-08-27 00:42:36 kmodi>
;; Hi-lock: (("\\(^;\\{3,\\}\\)\\( *.*\\)" (1 'org-hide prepend) (2 '(:inherit org-level-1 :height 1.3 :weight bold :overline t :underline t) prepend)))
;; Hi-Lock: end


;;  org-tree-slide
;;  Org Cliplink
;;  Htmlize Region→File
;;  Include src lines
;;  Convert included pdf to image
;;  Extract image from included .zip
;;  Org Export
;;    ox-latex - LaTeX export
;;    ox-html - HTML export
