diff --git a/editors/emacs/README.md b/editors/emacs/README.md
index 1b1e60f..2cf9285 100644
--- a/editors/emacs/README.md
+++ b/editors/emacs/README.md
@@ -2,12 +2,12 @@
 
 ##Requirements
 * You must have the [auto-complete](https://github.com/auto-complete/auto-complete) package.
-And [yasnippet](https://github.com/capitaomorte/yasnippet) package is recommended.
+[yasnippet](https://github.com/capitaomorte/yasnippet) and [popwin](https://github.com/m2ym/popwin-el) is recommended.
 * Make sure dcd-client and dcd-server is in your exec-path. Otherwise, please set the variable ```dcd-exectutable``` and ```dcd-server-executable``` using ```M-x customize```.
 
 ## Setup
 * First, follow the Setup section in the root README.
-* Second, add the following to your .emacs. With this setting, dcd-server starts automatically when you open file in d-mode.
+* Second, add the following to your .emacs. With this setting, dcd-server starts automatically when you open file in d-mode.  (Of course, you should edit ```path_to_ac-dcd.el``` to suit your enviroment.)
 
 ```
 ;;; ac-dcd
@@ -20,9 +20,13 @@ And [yasnippet](https://github.com/capitaomorte/yasnippet) package is recommende
 			 (ac-dcd-maybe-start-server)
 			 (add-to-list 'ac-sources 'ac-source-dcd)))
 
-(define-key d-mode-map (kbd "C-c ?") 'ac-dcd-popup-ddoc-at-point)
+(define-key d-mode-map (kbd "C-c ?") 'ac-dcd-show-ddoc-with-buffer)
 (define-key d-mode-map (kbd "C-c .") 'ac-dcd-goto-definition)
 (define-key d-mode-map (kbd "C-c ,") 'ac-dcd-goto-def-pop-marker)
+
+(when (featurep 'popwin)
+(add-to-list 'popwin:special-display-config
+`(,ac-dcd-document-buffer-name :position right :width 80)))
 ```
 
 * Third, set import path using ```M-x customize-variable RET ac-dcd-flags```.