diff --git a/public/views/body.ejs b/public/views/body.ejs
index 771da8803..11bccfef4 100644
--- a/public/views/body.ejs
+++ b/public/views/body.ejs
@@ -151,4 +151,5 @@
         </div>
     </div>
 </div>
-<%- include modal %>
\ No newline at end of file
+<%- include signin-modal %>
+<%- include help-modal %>
\ No newline at end of file
diff --git a/public/views/header.ejs b/public/views/header.ejs
index 6218187fd..bbabe7781 100644
--- a/public/views/header.ejs
+++ b/public/views/header.ejs
@@ -59,7 +59,7 @@
                 <li role="presentation"><a role="menuitem" class="ui-download-html" tabindex="-1" href="#" target="_self"><i class="fa fa-file-code-o fa-fw"></i> HTML</a>
                 </li>
                 <li class="divider"></li>
-                <li><a href="https://www.facebook.com/messages/866415986748945" class="ui-feedback" title="Feedback" target="_blank"><i class="fa fa-bullhorn fa-fw"></i> Feedback</a>
+                <li role="presentation"><a role="menuitem" class="ui-help" href="#" data-toggle="modal" data-target=".help-modal"><i class="fa fa-question-circle fa-fw"></i> Help</a>
                 </li>
             </ul>
             <a class="btn btn-link ui-mode">
@@ -80,9 +80,9 @@
                     <input type="radio" name="mode" autocomplete="off"><i class="fa fa-columns"></i>
                 </label>
             </div>
-            <a href="https://www.facebook.com/messages/866415986748945" class="btn btn-link ui-feedback" title="Feedback" target="_blank">
-                <i class="fa fa-bullhorn"></i>
-            </a>
+            <span class="btn btn-link btn-file ui-help" title="Help" data-toggle="modal" data-target=".help-modal">
+                <i class="fa fa-question-circle"></i>
+            </span>
             <span class="btn btn-link btn-file ui-upload-image" title="Upload Image" style="display:none;">
                 <i class="fa fa-camera"></i><input type="file" accept="image/*" name="upload" multiple>
             </span>
diff --git a/public/views/help-modal.ejs b/public/views/help-modal.ejs
new file mode 100644
index 000000000..15342262e
--- /dev/null
+++ b/public/views/help-modal.ejs
@@ -0,0 +1,132 @@
+<!-- help modal -->
+<div class="modal fade help-modal" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel" aria-hidden="true">
+    <div class="modal-dialog modal-lg">
+        <div class="modal-content">
+            <div class="modal-header">
+                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span>
+                </button>
+                <h4 class="modal-title" id="mySmallModalLabel"><i class="fa fa-question-circle"></i> Help</h4>
+            </div>
+            <div class="modal-body">
+                <div class="row">
+                    <div class="col-lg-3">
+                        <div class="panel panel-default">
+                            <div class="panel-heading">
+                                <h3 class="panel-title">Contacts</h3>
+                            </div>
+                            <div class="panel-body">
+                                <a href="https://github.com/hackmdio/hackmd/issues" title="Report an issue" target="_blank"><i class="fa fa-tag fa-fw"></i> Report an issue</a> 
+                                <br>
+                                <a href="mailto:hackmdio@gmail.com" title="Send us email"><i class="fa fa-envelope fa-fw"></i> Send us email</a>
+                            </div>
+                        </div>
+                        <div class="panel panel-default">
+                            <div class="panel-heading">
+                                <h3 class="panel-title">Documents</h3>
+                            </div>
+                            <div class="panel-body">
+                                <a href="./features" title="Features" target="_blank"><i class="fa fa-dot-circle-o fa-fw"></i> Features</a>
+                                <br>
+                                <a href="./yaml-metadata" title="YAML Metadata" target="_blank"><i class="fa fa-dot-circle-o fa-fw"></i> YAML Metadata</a>
+                                <br>
+                                <a href="./slide-example" title="Slide Example" target="_blank"><i class="fa fa-dot-circle-o fa-fw"></i> Slide Example</a>
+                            </div>
+                        </div>
+                    </div>
+                    <div class="col-lg-9">
+                        <div class="panel panel-default">
+                            <div class="panel-heading">
+                                <h3 class="panel-title">Cheatsheet</h3>
+                            </div>
+                            <div class="panel-body" style="max-height: 470px; overflow: auto;">
+                                <table class="table table-condensed">
+                                    <thead>
+                                        <tr>
+                                            <th>Example</th>
+                                            <th>Syntax</th>
+                                        </tr>
+                                    </thead>
+                                    <tbody class="markdown-body" style="font-family: inherit; font-size: 14px; padding: 0; max-width: inherit;">
+                                        <tr>
+                                            <td>Header</td>
+                                            <td># Header</td>
+                                        </tr>
+                                        <tr>
+                                            <td><ul><li>Unordered List</li></ul><ol><li>Ordered List</li></ol><ul><li class="task-list-item"><input type="checkbox" class="task-list-item-checkbox" disabled><label></label>Todo List</li></ul></td>
+                                            <td>- Unordered List<br>1. Ordered List<br>- [ ] Todo List</td>
+                                        </tr>
+                                        <tr>
+                                            <td><blockquote> Blockquote</blockquote></td>
+                                            <td>> Blockquote</td>
+                                        </tr>
+                                        <tr>
+                                            <td><strong>Bold font</strong></td>
+                                            <td>**Bold font**</td>
+                                        </tr>
+                                        <tr>
+                                            <td><i>Italics font</i></td>
+                                            <td>*Italics font*</td>
+                                        </tr>
+                                        <tr>
+                                            <td><s>Strikethrough</s></td>
+                                            <td>~~strikethrough~~</td>
+                                        </tr>
+                                        <tr>
+                                            <td>19<sup>th</sup></td>
+                                            <td>19^th^</td>
+                                        </tr>
+                                        <tr>
+                                            <td>H<sub>2</sub>O</td>
+                                            <td>H~2~O</td>
+                                        </tr>
+                                        <tr>
+                                            <td><ins>Inserted text</ins></td>
+                                            <td>++Inserted text++</td>
+                                        </tr>
+                                        <tr>
+                                            <td><mark>Marked text</mark></td>
+                                            <td>==Marked text==</td>
+                                        </tr>
+                                        <tr>
+                                            <td><a>Link</a></td>
+                                            <td>[title](http://)</td>
+                                        </tr>
+                                        <tr>
+                                            <td>Image</td>
+                                            <td>![alt](http:// title)</td>
+                                        </tr>
+                                        <tr>
+                                            <td><code>Code</code></td>
+                                            <td>`code`</td>
+                                        </tr>
+                                        <tr>
+                                            <td><pre style="border:none !important;"><code class="javascript hljs"><div class="wrapper"><div class="gutter linenumber"><span data-linenumber="1"></span></div><div class="code"><span class="hljs-keyword">var</span> i = <span class="hljs-number">0</span>;
+</div></div></code></pre></td>
+                                            <td>```javascript<br>var i = 0;<br>```</td>
+                                        </tr>
+                                        <tr>
+                                            <td><img align="absmiddle" alt=":smile:" class="emoji" src="./vendor/emojify/images/smile.png" title=":smile:"></img></td>
+                                            <td>:smile:</td>
+                                        </tr>
+                                        <tr>
+                                            <td>Externals</td>
+                                            <td>{%youtube youtube_id %}</td>
+                                        </tr>
+                                        <tr>
+                                            <td>L<sup>a</sup>T<sub>e</sub>X</td>
+                                            <td>$L^aT_eX$</td>
+                                        </tr>
+                                        <tr>
+                                            <td><div class="alert alert-info"><p>This is a alert area.</p></div></td>
+                                            <td>:::info<br>This is a alert area.<br>:::</td>
+                                        </tr>
+                                    </tbody>
+                                </table>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
\ No newline at end of file
diff --git a/public/views/index.ejs b/public/views/index.ejs
index 8c10e885e..69b525e95 100644
--- a/public/views/index.ejs
+++ b/public/views/index.ejs
@@ -174,7 +174,7 @@
             </div>
         </div>
     </div>
-    <%- include modal %>
+    <%- include signin-modal %>
 
     <!-- Bootstrap core JavaScript
     ================================================== -->
diff --git a/public/views/modal.ejs b/public/views/signin-modal.ejs
similarity index 100%
rename from public/views/modal.ejs
rename to public/views/signin-modal.ejs