diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba9839a..2ee588f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 ### Added
 - `inputStyle` and `nativeSpellcheck` options to manage the native language of the browser (Thanks to [@firm1], [#143]).
+- Group buttons in drop-down lists by adding a sub-option `children` for the items in the toolbar (Thanks to [@firm1], [#141]).
 - `sanitizerFunction` option to allow custom HTML sanitizing in the markdown preview (Thanks to [@adamb70], [#147]).
 ### Changed
 - Delay before assuming that submit of the form as failed is `autosave.submit_delay` instead of `autosave.delay` (Thanks to [@Situphen], [#139]).
diff --git a/README.md b/README.md
index 01a1ef5..44b4fd9 100644
--- a/README.md
+++ b/README.md
@@ -351,6 +351,46 @@ var easyMDE = new EasyMDE({
 });
 ```
 
+Put some buttons on dropdown menu
+
+```Javascript
+var easyMDE = new EasyMDE({
+	toolbar: [{
+                name: "heading",
+                action: EasyMDE.toggleHeadingSmaller,
+                className: "fa fa-header",
+                title: "Headers",
+            },
+            "|",
+            {
+                name: "others",
+                className: "fa fa-blind",
+                title: "others buttons",
+                children: [
+                    {
+                        name: "image",
+                        action: EasyMDE.drawImage,
+                        className: "fa fa-picture-o",
+                        title: "Image",
+                    },
+                    {
+                        name: "quote",
+                        action: EasyMDE.toggleBlockquote,
+                        className: "fa fa-percent",
+                        title: "Quote",
+                    },
+                    {
+                        name: "link",
+                        action: EasyMDE.drawLink,
+                        className: "fa fa-link",
+                        title: "Link",
+                    }
+                ]
+            },
+		// [, ...]
+	]
+});
+```
 
 ### Keyboard shortcuts
 
diff --git a/src/css/easymde.css b/src/css/easymde.css
index a027a14..92cf821 100644
--- a/src/css/easymde.css
+++ b/src/css/easymde.css
@@ -22,7 +22,7 @@
     right: 0;
     bottom: 0;
     height: auto;
-    z-index: 9;
+    z-index: 8;
     border-right: none !important;
     border-bottom-right-radius: 0 !important;
 }
@@ -72,9 +72,6 @@
 .editor-toolbar.fullscreen {
     width: 100%;
     height: 50px;
-    overflow-x: auto;
-    overflow-y: hidden;
-    white-space: nowrap;
     padding-top: 10px;
     padding-bottom: 10px;
     box-sizing: border-box;
@@ -119,12 +116,11 @@
     padding: 0;
 }
 
-.editor-toolbar button {
+.editor-toolbar button, .editor-toolbar .easymde-dropdown {
     background: transparent;
     display: inline-block;
     text-align: center;
     text-decoration: none !important;
-    width: 30px;
     height: 30px;
     margin: 0;
     padding: 0;
@@ -133,6 +129,10 @@
     cursor: pointer;
 }
 
+.editor-toolbar button {
+    width: 30px;
+}
+
 .editor-toolbar button.active,
 .editor-toolbar button:hover {
     background: #fcfcfc;
@@ -316,3 +316,29 @@
     color: #7f8c8d;
     font-style: italic;
 }
+
+.editor-toolbar .easymde-dropdown {
+    position: relative;
+    background: linear-gradient(to bottom right, #fff 0%, #fff 84%, #333 50%, #333 100%);
+    border-radius: 0;
+    border: 1px solid #fff;
+}
+
+.editor-toolbar .easymde-dropdown:hover {
+    background: linear-gradient(to bottom right, #fff 0%, #fff 84%, #333 50%, #333 100%);
+}
+
+.easymde-dropdown-content {
+    display: none;
+    position: absolute;
+    background-color: #f9f9f9;
+    box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2);
+    padding: 8px;
+    z-index: 2;
+    top: 30px;
+}
+
+.easymde-dropdown:active .easymde-dropdown-content,
+.easymde-dropdown:focus .easymde-dropdown-content {
+    display: block;
+}
diff --git a/src/js/easymde.js b/src/js/easymde.js
index 5e4d8ce..761f604 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -110,15 +110,39 @@ function fixShortcut(name) {
     return name;
 }
 
+/**
+ * Create dropdown block
+ */
+function createToolbarDropdown(options, enableTooltips, shortcuts, parent) {
+    var el = createToolbarButton(options, false, enableTooltips, shortcuts, 'button', parent);
+    el.className += ' easymde-dropdown';
+    var content = document.createElement('div');
+    content.className = 'easymde-dropdown-content';
+    for (var childrenIndex = 0; childrenIndex < options.children.length; childrenIndex++) {
+
+        var child = options.children[childrenIndex];
+        var childElement;
+
+        if (typeof child === 'string' && child in toolbarBuiltInButtons) {
+            childElement = createToolbarButton(toolbarBuiltInButtons[child], true, enableTooltips, shortcuts, 'button', parent);
+        } else {
+            childElement = createToolbarButton(child, true, enableTooltips, shortcuts, 'button', parent);
+        }
+
+        content.appendChild(childElement);
+    }
+    el.appendChild(content);
+    return el;
+}
 
 /**
  * Create button element for toolbar.
  */
-function createToolbarButton(options, enableTooltips, shortcuts) {
+function createToolbarButton(options, enableActions, enableTooltips, shortcuts, markup, parent) {
     options = options || {};
-    var el = document.createElement('button');
+    var el = document.createElement(markup);
     el.className = options.name;
-    el.setAttribute('type', 'button');
+    el.setAttribute('type', markup);
     enableTooltips = (enableTooltips == undefined) ? true : enableTooltips;
 
     // Properly hande custom shortcuts
@@ -167,6 +191,20 @@ function createToolbarButton(options, enableTooltips, shortcuts) {
     }
     el.appendChild(icon);
 
+    if (options.action && enableActions) {
+        if (typeof options.action === 'function') {
+            el.onclick = function (e) {
+                e.preventDefault();
+                options.action(parent);
+            };
+        } else if (typeof options.action === 'string') {
+            el.onclick = function (e) {
+                e.preventDefault();
+                window.open(options.action, '_blank');
+            };
+        }
+    }
+
     return el;
 }
 
@@ -1762,7 +1800,7 @@ EasyMDE.prototype.markdown = function (text) {
 
         // Convert the markdown to HTML
         var htmlText = marked(text);
-        
+
         // Sanitize HTML
         if (this.options.renderingConfig && typeof this.options.renderingConfig.sanitizerFunction === 'function') {
             htmlText = this.options.renderingConfig.sanitizerFunction.call(this, htmlText);
@@ -2258,24 +2296,12 @@ EasyMDE.prototype.createToolbar = function (items) {
             var el;
             if (item === '|') {
                 el = createSep();
+            } else if (item.children) {
+                el = createToolbarDropdown(item, self.options.toolbarTips, self.options.shortcuts, self);
             } else {
-                el = createToolbarButton(item, self.options.toolbarTips, self.options.shortcuts);
+                el = createToolbarButton(item, true, self.options.toolbarTips, self.options.shortcuts, 'button', self);
             }
 
-            // bind events, special for info
-            if (item.action) {
-                if (typeof item.action === 'function') {
-                    el.onclick = function (e) {
-                        e.preventDefault();
-                        item.action(self);
-                    };
-                } else if (typeof item.action === 'string') {
-                    el.onclick = function (e) {
-                        e.preventDefault();
-                        window.open(item.action, '_blank');
-                    };
-                }
-            }
 
             toolbarData[item.name || item] = el;
             bar.appendChild(el);
diff --git a/types/easymde-test.ts b/types/easymde-test.ts
index cc08210..63cfb1d 100644
--- a/types/easymde-test.ts
+++ b/types/easymde-test.ts
@@ -43,18 +43,18 @@ const editor2 = new EasyMDE({
         {
             name: 'bold',
             action: EasyMDE.toggleBold,
-            className: 'fa fa-bolt',
+            className: 'fa fas fa-bolt',
             title: 'Bold'
         },
         '|',
+        'undo',
         {
-            // Separator
             name: 'alert',
             action: (editor: EasyMDE) => {
                 alert('This is from a custom button action!');
                 // Custom functions have access to the `editor` instance.
             },
-            className: 'fa fa-star',
+            className: 'fa fas fa-star',
             title: 'A Custom Button',
             noDisable: undefined,
             noMobile: false
@@ -67,6 +67,29 @@ const editor2 = new EasyMDE({
             title: 'A Custom Link',
             noDisable: true,
             noMobile: true
+        },
+        'preview',
+        {
+            name: 'links',
+            className: 'fa fas fa-arrow-down',
+            title: 'A Custom Link',
+            children: [
+                {
+                    name: 'link',
+                    action: 'https://github.com/Ionaru/easy-markdown-editor',
+                    className: 'fa fab fa-github',
+                    title: 'A Custom Link',
+                    noDisable: true,
+                    noMobile: true
+                },
+                'preview',
+                {
+                    name: 'bold',
+                    action: EasyMDE.toggleBold,
+                    className: 'fa fas fa-bold',
+                    title: 'Bold'
+                },
+            ]
         }
     ]
 });
diff --git a/types/easymde.d.ts b/types/easymde.d.ts
index 9391416..0ef9e53 100644
--- a/types/easymde.d.ts
+++ b/types/easymde.d.ts
@@ -22,6 +22,29 @@
 /// <reference types="codemirror"/>
 /// <reference types="marked"/>
 
+interface ArrayOneOrMore<T> extends Array<T> {
+    0: T
+}
+
+type ToolbarButton =
+    'strikethrough'
+    | 'code'
+    | 'table'
+    | 'redo'
+    | 'heading'
+    | 'undo'
+    | 'heading-bigger'
+    | 'heading-smaller'
+    | 'heading-1'
+    | 'heading-2'
+    | 'heading-3'
+    | 'clean-block'
+    | 'horizontal-rule'
+    | 'preview'
+    | 'side-by-side'
+    | 'fullscreen'
+    | 'guide';
+
 declare namespace EasyMDE {
     interface AutoSaveOptions {
         enabled?: boolean;
@@ -87,6 +110,15 @@ declare namespace EasyMDE {
         onUpdate: (element: HTMLElement) => void;
     }
 
+    interface ToolbarDropdownIcon {
+        name: string;
+        children: ArrayOneOrMore<ToolbarIcon | ToolbarButton>;
+        className: string;
+        title: string;
+        noDisable?: boolean;
+        noMobile?: boolean;
+    }
+
     interface ToolbarIcon {
         name: string;
         action: string | ((editor: EasyMDE) => void);
@@ -139,7 +171,7 @@ declare namespace EasyMDE {
         status?: boolean | ReadonlyArray<string | StatusBarItem>;
         styleSelectedText?: boolean;
         tabSize?: number;
-        toolbar?: boolean | ReadonlyArray<'|' | ToolbarIcon>;
+        toolbar?: boolean | ReadonlyArray<'|' | ToolbarButton | ToolbarIcon | ToolbarDropdownIcon>;
         toolbarTips?: boolean;
         onToggleFullScreen?: (goingIntoFullScreen: boolean) => void;
         theme?: string;