4 files changed, 97 insertions, 20 deletions
diff --git a/public/docs/features.md b/public/docs/features.md
index f684ca62..a4ffb633 100644
--- a/public/docs/features.md
+++ b/public/docs/features.md
@@ -8,7 +8,7 @@ This means that you can write notes with other people on your **desktop**, **tab
 You can sign-in via multiple auth providers like **Facebook**, **Twitter**, **GitHub** and many more on the [_homepage_](/).
 
 If you experience any _issues_, feel free to report it on [**GitHub**](https://github.com/hackmdio/codimd/issues).
-Or meet us on [**Matrix.org**](https://riot.im/app/#/room/#codimd:matrix.org) or [**Gitter**](https://gitter.im/hackmdio/hackmd) for dev-talk and interactive help.
+Or meet us on [**Matrix.org**](https://riot.im/app/#/room/#codimd:matrix.org) for dev-talk and interactive help.
 **Thank you very much!**
 
 Workspace
@@ -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:
@@ -88,9 +90,23 @@ You can hover and click <i class="fa fa-chain"></i> to anchor on it.
 
 Edit:
 ===
+## Editor Modes:
+You can look in the bottom right section of the editor area, there you'll find a button with `sublime` on it.
+When you click it, you can select 3 editor modes:
+
+- sublime (default)
+- emacs
+- vim
+
 ## Shortcut Keys:
-Just like Sublime text, which is pretty quick and convenient.
-> For more infomation, see [here](https://codemirror.net/demo/sublime.html).
+The shortcut keys depend on your selected editor mode. By default they are just like Sublime text, which is pretty quick and convenient.
+> For more information, see [here](https://codemirror.net/demo/sublime.html).
+
+For emacs:
+> For more information, see [here](https://codemirror.net/demo/emacs.html).
+
+For vim:
+> For more information, see [here](https://codemirror.net/demo/vim.html).
 
 ## Auto-Complete:
 This editor provides full auto-complete hints in markdown.
@@ -195,7 +211,7 @@ When you’re a carpenter making a beautiful chest of drawers, you’re not goin
 ## Externals
 
 ### YouTube
-{%youtube 1G4isv_Fylg %}
+{%youtube aqz-KE-bpKQ %}
 
 ### Vimeo
 {%vimeo 124148255 %}
diff --git a/public/docs/release-notes.md b/public/docs/release-notes.md
index 66202009..c775b70a 100644
--- a/public/docs/release-notes.md
+++ b/public/docs/release-notes.md
@@ -1,6 +1,55 @@
 Release Notes
 ===
 
+<i class="fa fa-tag"></i> 1.2.1 <i class="fa fa-clock-o"></i> 2018-09-26 00:00
+---
+
+### Enhancements
+* Update Italian translations
+* Update Japanese translations
+* Update markdown-pdf
+* Add support for unix sockets
+* Update "follow us" information to Community channel and translation
+* Add Cloudron installation method
+* Add guide for Mattermost authentication
+* Update various packages
+* Add Indonesian language as new translation
+
+### Fixes
+* Fix content types in status router
+* Fix some modal colors in night mode
+* Fix CSP to allow usage of speaker notes
+* Fix some wrong title attributes in the editor toolbar
+* Fix some confusion about the default location of images. It's always the local filesystem now
+* Fix object handling in avatar generation code
+* Finally fix error handling of LZ-String by using self-maintained version
+* Fix migration handling
+* Fix gitlab API version
+* Fix some server crashes caused by PDF creation
+* Fix document length limit on post to `/new`
+* Fix broken youtube embedding on `/features` page
+
+### Refactors
+* Refactor generation of table of contents
+* Refactor "copyright"-section to be a "Powered by"
+
+### Removes
+* Remove unneeded inline styling
+
+### Deprecations
+* NodeJS version 6
+* Mattermost login integration (is replaced by [generic oAuth2 module](https://github.com/hackmdio/codimd/blob/6ce7b20a7f92ccff2f7f870ff5d116d685310cfd/docs/guides/auth/mattermost-self-hosted.md))
+
+### Honorable mentions
+* [Alex Hesse (Pingu501)](https://github.com/Pingu501)
+* [Alexander Wellbrock (w4tsn)](https://github.com/w4tsn)
+* [Cédric Couralet (micedre)](https://github.com/micedre)
+* [Girish Ramakrishnan (gramakri)](https://github.com/gramakri)
+* [maahl](https://github.com/maahl)
+* [Max Wu (jackycute)](https://github.com/jackycute)
+* [Miranda (ahihi)](https://github.com/ahihi)
+* [Ondřej Slabý (maxer456)](https://github.com/maxer456)
+
 <i class="fa fa-tag"></i> 1.2.0 <i class="fa fa-clock-o"></i> 2018-06-28 00:00
 ---
 
diff --git a/public/docs/slide-example.md b/public/docs/slide-example.md
index 411f31d4..49503669 100644
--- a/public/docs/slide-example.md
+++ b/public/docs/slide-example.md
@@ -1,4 +1,5 @@
 ---
+type: slide
 slideOptions:
   transition: slide
 ---
@@ -270,7 +271,7 @@ Press `B` or `.` on your keyboard to pause the presentation. This is helpful whe
 
 Down below you can find a print icon<i class="fa fa-fw fa-print"></i>.
 
-After you click on it, use the print function of your browser (either CTRL+P or cmd+P) to print the slides as PDF.
+After you click on it, use the print function of your browser (either CTRL+P or cmd+P) to print the slides as PDF. [See official reveal.js instructions for details](https://github.com/hakimel/reveal.js#instructions-1)
 
 ---
 
diff --git a/public/docs/yaml-metadata.md b/public/docs/yaml-metadata.md
index 888345f7..839616a8 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