diff --git a/src/plugins/help/README.md b/src/plugins/help/README.md
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+Help screen plugin
+===================
+
+Shows a help popup when a presentation is loaded, as well as when 'H' is pressed.
+
+To enable the help popup, add following div to your presentation:
+
+    <div id="impress-help"></div>
+
+Example CSS:
+
+        .impress-enabled #impress-help {
+            background: none repeat scroll 0 0 rgba(0, 0, 0, 0.5);
+            color: #EEEEEE;
+            font-size: 80%;
+            position: fixed;
+            left: 2em;
+            bottom: 2em;
+            width: 24em;
+            border-radius: 1em;
+            padding: 1em;
+            text-align: center;
+            z-index: 100;
+            font-family: Verdana, Arial, Sans;
+        }
+        .impress-enabled #impress-help td {
+            padding-left: 1em;
+            padding-right: 1em;
+        }
+
+
+
+Author
+------
+
+Copyright Henrik Ingo (@henrikingo), 2016
+MIT License
diff --git a/src/plugins/help/help.js b/src/plugins/help/help.js
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+/**
+ * Help popup plugin
+ *
+ * Example:
+ *
+ *     <!-- Show a help popup at start, or if user presses "H" -->
+ *     <div id="impress-help"></div>
+ *
+ * For developers:
+ *
+ * Typical use for this plugin, is for plugins that support some keypress, to add a line
+ * to the help popup produced by this plugin. For example "P: Presenter console".
+ *
+ * Copyright 2016 Henrik Ingo (@henrikingo)
+ * Released under the MIT license.
+ */
+/* global window, document */
+
+( function( document, window ) {
+    "use strict";
+    var rows = [];
+    var timeoutHandle;
+
+    var triggerEvent = function( el, eventName, detail ) {
+        var event = document.createEvent( "CustomEvent" );
+        event.initCustomEvent( eventName, true, true, detail );
+        el.dispatchEvent( event );
+    };
+
+    var renderHelpDiv = function() {
+        var helpDiv = document.getElementById( "impress-help" );
+        if ( helpDiv ) {
+            var html = [];
+            for ( var row in rows ) {
+                for ( var arrayItem in row ) {
+                    html.push( rows[ row ][ arrayItem ] );
+                }
+            }
+            if ( html ) {
+                helpDiv.innerHTML = "<table>\n" + html.join( "\n" ) + "</table>\n";
+            }
+        }
+    };
+
+    var toggleHelp = function() {
+        var helpDiv = document.getElementById( "impress-help" );
+        if ( !helpDiv ) {
+            return;
+        }
+
+        if ( helpDiv.style.display === "block" ) {
+            helpDiv.style.display = "none";
+        } else {
+            helpDiv.style.display = "block";
+            window.clearTimeout( timeoutHandle );
+        }
+    };
+
+    document.addEventListener( "keyup", function( event ) {
+
+        // Check that event target is html or body element.
+        if ( event.target.nodeName === "BODY" || event.target.nodeName === "HTML" ) {
+            if ( event.keyCode === 72 ) { // "h"
+                event.preventDefault();
+                toggleHelp();
+            }
+        }
+    }, false );
+
+    // API
+    // Other plugins can add help texts, typically if they support an action on a keypress.
+    /**
+     * Add a help text to the help popup.
+     *
+     * :param: e.detail.command  Example: "H"
+     * :param: e.detail.text     Example: "Show this help."
+     * :param: e.detail.row      Row index from 0 to 9 where to place this help text. Example: 0
+     */
+    document.addEventListener( "impress:help:add", function( e ) {
+
+        // The idea is for the sender of the event to supply a unique row index, used for sorting.
+        // But just in case two plugins would ever use the same row index, we wrap each row into
+        // its own array. If there are more than one entry for the same index, they are shown in
+        // first come, first serve ordering.
+        var rowIndex = e.detail.row;
+        if ( typeof rows[ rowIndex ] !== "object" || !rows[ rowIndex ].isArray ) {
+            rows[ rowIndex ] = [];
+        }
+        rows[ e.detail.row ].push( "<tr><td><strong>" + e.detail.command + "</strong></td><td>" +
+                                   e.detail.text + "</td></tr>" );
+        renderHelpDiv();
+    } );
+
+    document.addEventListener( "impress:init", function( e ) {
+        renderHelpDiv();
+
+        // At start, show the help for 7 seconds.
+        var helpDiv = document.getElementById( "impress-help" );
+        if ( helpDiv ) {
+            helpDiv.style.display = "block";
+            timeoutHandle = window.setTimeout( function() {
+                var helpDiv = document.getElementById( "impress-help" );
+                helpDiv.style.display = "none";
+            }, 7000 );
+
+            // Regster callback to empty the help div on teardown
+            var api = e.detail.api;
+            api.lib.gc.addCallback( function() {
+                window.clearTimeout( timeoutHandle );
+                helpDiv.style.display = "";
+                helpDiv.innerHTML = "";
+                rows = [];
+            } );
+        }
+
+        // Use our own API to register the help text for "h"
+        triggerEvent( document, "impress:help:add",
+                      { command: "H", text: "Show this help", row: 0 } );
+    } );
+
+} )( document, window );
+