diff --git a/public/docs/features.md b/public/docs/features.md
index 31c08d2..a4ffb63 100644
--- a/public/docs/features.md
+++ b/public/docs/features.md
@@ -72,9 +72,11 @@ Notes can be embedded as follows:
 
 ## [Slide Mode](./slide-example):
 You can use a special syntax to organize your note into slides.
-After that, you can use the **Slide Mode** <i class="fa fa-tv"></i> to make a presentation.
+After that, you can use the **[Slide Mode](./slide-example)** <i class="fa fa-tv"></i> to make a presentation.
 Visit the above link for details.
 
+To switch the editor into slide mode, set the [document type](./yaml-metadata#type) to `slide`.
+
 View
 ===
 ## Table of Contents:
diff --git a/public/docs/slide-example.md b/public/docs/slide-example.md
index 5503cbd..4950366 100644
--- a/public/docs/slide-example.md
+++ b/public/docs/slide-example.md
@@ -1,4 +1,5 @@
 ---
+type: slide
 slideOptions:
   transition: slide
 ---
diff --git a/public/docs/yaml-metadata.md b/public/docs/yaml-metadata.md
index 888345f..839616a 100644
--- a/public/docs/yaml-metadata.md
+++ b/public/docs/yaml-metadata.md
@@ -25,7 +25,7 @@ This option will set the note title which prior than content title.
 > default: not set
 
 **Example**
-```xml
+```yml
 title: meta title
 ```
 
@@ -36,7 +36,7 @@ This option will set the note description.
 > default: not set
 
 **Example**
-```xml
+```yml
 description: meta description
 ```
 
@@ -47,7 +47,7 @@ This option will set the tags which prior than content tags.
 > default: not set
 
 **Example**
-```xml
+```yml
 tags: features, cool, updated
 ```
 
@@ -62,7 +62,7 @@ So you can prevent any search engine index your note by set `noindex, nofollow`.
 > default: not set
 
 **Example**
-```xml
+```yml
 robots: noindex, nofollow
 ```
 
@@ -75,13 +75,13 @@ https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
 > default: not set (which will be en)
 
 **Example**
-```xml
+```yml
 langs: ja-jp
 ```
 
 dir
 ---
-This option provide to describe the direction of the text in this note.
+This option specifies the direction of the text in this note.
 You can only use whether `rtl` or `ltr`.
 Look more at here:
 http://www.w3.org/International/questions/qa-html-dir
@@ -89,7 +89,7 @@ http://www.w3.org/International/questions/qa-html-dir
 > default: not set (which will be ltr)
 
 **Example**
-```xml
+```yml
 dir: rtl
 ```
 
@@ -102,35 +102,46 @@ You can only use whether `true` or `false`.
 > default: not set (which will be true)
 
 **Example**
-```xml
+```yml
 breaks: false
 ```
 
 GA
 ---
-This option allow you to enable Google Analytics with your ID.
+This option allows you to enable Google Analytics with your ID.
 
 > default: not set (which won't enable)
 
 **Example**
-```xml
+```yml
 GA: UA-12345667-8
 ```
 
 disqus
 ---
-This option allow you to enable Disqus with your shortname.
+This option allows you to enable Disqus with your shortname.
 
 > default: not set (which won't enable)
 
 **Example**
-```xml
+```yml
 disqus: codimd
 ```
 
+type
+---
+This option allows you to switch the document view to the slide preview, to simplify live editing of presentations.
+
+> default: not set
+
+**Example:**
+```yml
+type: slide
+```
+
 slideOptions
 ---
-This option allow you provide custom options to slide mode.
+This option allows you to provide custom options to slide mode.
 Please below document for more details:
 https://github.com/hakimel/reveal.js/#configuration
 
@@ -142,7 +153,7 @@ https://github.com/hakimel/reveal.js/tree/master/css/theme
 > default: not set (which use default slide options)
 
 **Example**
-```xml
+```yml
 slideOptions:
   transition: fade
   theme: white