diff --git a/docs/API.md b/docs/API.md
index 1f5f25bd..a48cb8ea 100644
--- a/docs/API.md
+++ b/docs/API.md
@@ -19,6 +19,7 @@ with the following top-level properties:
 | `entryOptions` | object | Optional | `{}` | Configures happychat entry points. See details below. |
 | `groups` | array | Optional | `[WP.com]` | What group the chat session should be routed to. Valid values are `WP.com`, `woo`, and `jpop`. |
 | `canChat` | bool | Optional | `true` | Whether the user can be offered chat or not. |
+| `layout` | string | Optional | `max-width-fixed-height` | The chat layout `max-width-fixed-height`\|`max-parent-size`\|`panel-fixed-size`\|`panel-max-parent-size` |
 | `nodeId` | string | Mandatory | `null` | The id of the HTMLNode where Happychat will be rendered. |
 
 ### The entry prop
diff --git a/src/api.js b/src/api.js
index c5f9d0d1..7870ebfa 100644
--- a/src/api.js
+++ b/src/api.js
@@ -15,6 +15,7 @@ import {
 	renderError,
  } from './index';
 import authenticator from 'src/lib/auth';
+import { LAYOUT_MAX_WIDTH_FIXED_HEIGHT } from './constants';
 
 const api = {
 	/**
@@ -26,13 +27,14 @@ const api = {
 	 * @param {Object} authentication.options.token Optional. WP.com oAuth access token to be used
 	 * @param {Object} authentication.options.proxy Optional. WP.com proxy object to be used
 	 * @param {boolean} canChat Optional. Whether the user can be offered chat. True by default.
-	 * @param {string} entry Optional. Valid values are ENTRY_FORM, ENTRY_CHAT.
+	 * @param {string} entry Optional. Valid values are 'form', 'chat'.
+	 * 			 ENTRY_FORM (constant for 'form') is the default and will render the contact form.
+	 * 			 ENTRY_CHAT (constant for 'chat') will render the chat form.
 	 * @param {Object} entryOptions Optional. Contains options to configure the selected entry.
 	 * @param {Array} groups Mandatory. Happychat groups this user belongs to.
+	 * @param {String} layout Optional. The chat layout max-width-fixed-height | max-parent-size | panel-fixed-size | panel-max-parent-size
 	 * @param {string} nodeId Mandatory. HTML Node id where Happychat will be rendered.
 	 * @param {Object} user Optional. Customer information .
-	 * 			 ENTRY_FORM is the default and will render the contact form.
-	 * 			 ENTRY_CHAT will render the chat form.
 	 */
 	open: ( {
 		authentication,
@@ -40,22 +42,24 @@ const api = {
 		entry,
 		entryOptions,
 		groups,
+		layout = LAYOUT_MAX_WIDTH_FIXED_HEIGHT,
 		nodeId,
 		user,
 	} ) => {
 		authenticator.init( authentication );
 
-		const targetNode = createTargetNode( { nodeId, groups, entryOptions } );
+		const targetNode = createTargetNode( { entryOptions, groups, layout, nodeId } );
 
 		authenticator.login()
 			.then( () => isEmpty( user ) ? authenticator.getUser() : Promise.resolve( user ) )
 			.then( userObject =>
 				renderHappychat( targetNode, {
-					userObject,
 					canChat,
-					groups,
 					entry,
 					entryOptions,
+					groups,
+					layout,
+					userObject,
 				} )
 			)
 			.catch( error => renderError( targetNode, { error } ) );
diff --git a/src/constants.js b/src/constants.js
index f91638ff..fe82eea1 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -3,8 +3,10 @@ export const AUTH_TYPE_WPCOM_OAUTH_BY_TOKEN = 'wpcom-oauth-by-token';
 export const AUTH_TYPE_WPCOM_PROXY_IFRAME = 'wpcom-proxy-iframe';
 
 // Layouts
-export const LAYOUT_FULLSCREEN = 'fullscreen';
-export const LAYOUT_PANEL = 'panel';
+export const LAYOUT_MAX_WIDTH_FIXED_HEIGHT = 'max-width-fixed-height';
+export const LAYOUT_MAX_PARENT_SIZE = 'max-parent-size';
+export const LAYOUT_PANEL_FIXED_SIZE = 'panel-fixed-size';
+export const LAYOUT_PANEL_MAX_PARENT_SIZE = 'panel-max-parent-size';
 
 // Entry
 export const ENTRY_CHAT = 'chat';
diff --git a/src/form.js b/src/form.js
index 72b97808..0f929ac1 100644
--- a/src/form.js
+++ b/src/form.js
@@ -78,6 +78,7 @@ class ChatComponent {
 			isCurrentUser,
 			isExternalUrl,
 			isServerReachable,
+			layout,
 			message,
 			onSendMessage,
 			onSendNotTyping,
@@ -100,6 +101,7 @@ class ChatComponent {
 				isCurrentUser={ isCurrentUser }
 				isExternalUrl={ isExternalUrl }
 				isServerReachable={ isServerReachable }
+				layout={ layout }
 				message={ message }
 				onSendMessage={ onSendMessage }
 				onSendNotTyping={ onSendNotTyping }
@@ -366,6 +368,7 @@ Form.propTypes = {
 	canChat: PropTypes.bool,
 	entry: PropTypes.string,
 	entryOptions: PropTypes.object,
+	layout: PropTypes.string,
 };
 
 // Whether URL should open a new tab or not.
diff --git a/src/form.scss b/src/form.scss
index 6c5620d6..82dfe033 100644
--- a/src/form.scss
+++ b/src/form.scss
@@ -40,6 +40,7 @@
 @import 'ui/components/timeline/style';
 @import 'ui/components/notices/style';
 @import 'ui/components/composer/style';
+@import 'ui/components/title/style';
 
 // main components
 @import 'ui/components/happychat-form/style';
diff --git a/src/index.js b/src/index.js
index b4bc4f37..b2b5ab2a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -9,6 +9,7 @@ import { Provider } from 'react-redux';
 import { applyMiddleware, createStore, compose } from 'redux';
 import { devToolsEnhancer } from 'redux-devtools-extension';
 import find from 'lodash/find';
+import includes from 'lodash/includes';
 
 /**
  * Internal dependencies
@@ -16,7 +17,7 @@ import find from 'lodash/find';
 // utils
 import { hasTouch } from 'src/lib/touch-detect';
 // UI components
-import Happychat, { ENTRY_FORM } from 'src/form';
+import Happychat from 'src/form';
 import { MessageForm } from 'src/ui/components/message-form';
 // state: general, actions, selectors
 import eventAPIFactory from 'src/state/event-api';
@@ -27,6 +28,13 @@ import { setAssetsLoaded } from 'src/state/ui/actions';
 import { setCurrentUser, setGroups, setLocale, setEligibility } from 'src/state/user/actions';
 import { setFallbackTicketOptions } from 'src/state/fallbackTicket/actions';
 import config from 'src/config';
+import {
+	ENTRY_FORM,
+	LAYOUT_MAX_WIDTH_FIXED_HEIGHT,
+	LAYOUT_MAX_PARENT_SIZE,
+	LAYOUT_PANEL_FIXED_SIZE,
+	LAYOUT_PANEL_MAX_PARENT_SIZE,
+} from 'src/constants';
 
 const store = createStore(
 	reducer,
@@ -47,9 +55,13 @@ const dispatchAssetsFinishedDownloading = () => store.dispatch( setAssetsLoaded(
  * @returns {HTMLNode} Target node where Happychat can hook into.
  */
 const createIframe = ( props, assetsLoadedHook = () => {} ) => {
-	const { nodeId, groups, entryOptions } = props;
+	const { entryOptions, groups, layout, nodeId } = props;
 	const iframeElement = document.createElement( 'iframe' );
 
+	let iframeHeight = 0;
+	let iframeWidth = 0;
+	switch ( layout ) {
+		case LAYOUT_MAX_WIDTH_FIXED_HEIGHT:
 	const primaryHasAnySecondary = options =>
 		Array.isArray( options ) && find( options, opt => opt.secondaryOptions );
 
@@ -59,14 +71,30 @@ const createIframe = ( props, assetsLoadedHook = () => {} ) => {
 
 	// Calculate height based on the number of components
 	// the iframe may need to render.
-	let iframeHeight = 480;
+			iframeHeight = 480;
 	iframeHeight = iframeHeight + ( entryOptions && entryOptions.primaryOptions ? 110 : 0 );
 	iframeHeight = iframeHeight + ( isThereAnySecondaryOptions( entryOptions ) ? 110 : 0 );
 	iframeHeight = iframeHeight + ( entryOptions && entryOptions.itemList ? 70 : 0 );
 
+			iframeHeight = iframeHeight + 'em';
+			iframeWidth = '100%';
+			break;
+
+		case LAYOUT_PANEL_FIXED_SIZE:
+			iframeHeight = '330em';
+			iframeWidth = '150em';
+			break;
+
+		case LAYOUT_MAX_PARENT_SIZE:
+		case LAYOUT_PANEL_MAX_PARENT_SIZE:
+			iframeHeight = '100%';
+			iframeWidth = '100%';
+			break;
+	}
+
 	// style iframe element
-	iframeElement.width = '100%';
-	iframeElement.height = iframeHeight + 'em';
+	iframeElement.width = iframeWidth;
+	iframeElement.height = iframeHeight;
 	iframeElement.frameBorder = 0;
 	iframeElement.scrolling = 'no';
 
@@ -156,6 +184,11 @@ const createIframe = ( props, assetsLoadedHook = () => {} ) => {
 	// some CSS styles depend on these top-level classes being present
 	iframeElement.contentDocument.body.classList.add( hasTouch() ? 'touch' : 'notouch' );
 
+	// add class for fullscreen
+	if ( includes( [ LAYOUT_MAX_PARENT_SIZE, LAYOUT_PANEL_MAX_PARENT_SIZE ], layout ) ) {
+		iframeElement.contentDocument.body.classList.add( 'is-fullscreen' );
+	}
+
 	// React advises to use an element -not the body itself- as the target render,
 	// that's why we create this wrapperElement inside the iframe.
 	const targetNode = document.createElement( 'div' );
@@ -189,7 +222,7 @@ export const renderHappychat = (
 			username,
 			display_name,
 			avatar_URL,
-			language,
+			localeSlug,
 		},
 		groups = [ HAPPYCHAT_GROUP_WPCOM ],
 		canChat = true,
@@ -208,7 +241,7 @@ export const renderHappychat = (
 		} )
 	);
 	store.dispatch( setGroups( groups ) );
-	store.dispatch( setLocale( language ) );
+	store.dispatch( setLocale( localeSlug ) );
 	store.dispatch( setFallbackTicketOptions( fallbackTicket ) );
 
 	isAnyCanChatPropFalse( canChat, entryOptions )
@@ -224,8 +257,8 @@ export const renderHappychat = (
 };
 /* eslint-enable camelcase */
 
-export const createTargetNode = ( { nodeId, groups, entryOptions } ) => {
-	return createIframe( { nodeId, groups, entryOptions }, dispatchAssetsFinishedDownloading );
+export const createTargetNode = ( props ) => {
+	return createIframe( props, dispatchAssetsFinishedDownloading );
 };
 
 export const renderError = ( targetNode, { error } ) =>
diff --git a/src/ui/components/happychat-form/index.js b/src/ui/components/happychat-form/index.js
index ec293d29..6d3c1df3 100644
--- a/src/ui/components/happychat-form/index.js
+++ b/src/ui/components/happychat-form/index.js
@@ -5,6 +5,7 @@
  */
 import React, { Component } from 'react';
 import PropTypes from 'prop-types';
+import includes from 'lodash/includes';
 
 /**
  * Internal dependencies
@@ -12,6 +13,8 @@ import PropTypes from 'prop-types';
 import { Composer } from 'src/ui/components/composer';
 import { Notices } from 'src/ui/components/notices';
 import { Timeline } from 'src/ui/components/timeline';
+import { Title } from 'src/ui/components/title';
+import { LAYOUT_PANEL_FIXED_SIZE, LAYOUT_PANEL_MAX_PARENT_SIZE } from 'src/constants';
 
 /**
  * React component for rendering a happychat client
@@ -47,6 +50,7 @@ export class HappychatForm extends Component {
 			isCurrentUser,
 			isExternalUrl,
 			isServerReachable,
+			layout,
 			message,
 			onSendMessage,
 			onSendNotTyping,
@@ -59,6 +63,9 @@ export class HappychatForm extends Component {
 
 		return (
 			<div className="happychat__page" aria-live="polite" aria-relevant="additions">
+				{ includes( [ LAYOUT_PANEL_FIXED_SIZE, LAYOUT_PANEL_MAX_PARENT_SIZE ], layout ) &&
+					<Title /> }
+
 				<Timeline
 					currentUserEmail={ currentUserEmail }
 					currentUserGroup={ currentUserGroup }
@@ -97,6 +104,7 @@ HappychatForm.propTypes = {
 	isCurrentUser: PropTypes.func,
 	isExternalUrl: PropTypes.func,
 	isServerReachable: PropTypes.bool,
+	layout: PropTypes.string,
 	message: PropTypes.string,
 	onSendMessage: PropTypes.func,
 	onSendNotTyping: PropTypes.func,
diff --git a/src/ui/components/happychat-form/style.scss b/src/ui/components/happychat-form/style.scss
index fb0c1dae..ff718426 100644
--- a/src/ui/components/happychat-form/style.scss
+++ b/src/ui/components/happychat-form/style.scss
@@ -2,6 +2,13 @@
 
 // experiment: style scrollbars
 .happychat__page {
+	height: 100%;
+    display: flex;
+    flex-direction: column;
+    justify-content: flex-start;
+    align-items: stretch;
+	align-content: stretch;
+
 	::-webkit-scrollbar {
 		width: 12px;
 		height: 12px;
@@ -27,6 +34,11 @@
 	border: 1px solid var(--neutral-lighten-25);
 }
 
+// override for fullscreen
+body.is-fullscreen .happychat__page {
+	border: 0;
+}
+
 // make textarea to fill the whole box
 .happychat__message > textarea {
 	width: 100%;
@@ -35,7 +47,6 @@
 
 // small tweaks to conversation container
 .happychat__conversation {
-	height: 80vh; // set height so it can be scrolled
 	padding-left: 6px;
 	padding-right: 6px;
 }
diff --git a/src/ui/components/title/index.jsx b/src/ui/components/title/index.jsx
index 31e3da12..72ae0880 100644
--- a/src/ui/components/title/index.jsx
+++ b/src/ui/components/title/index.jsx
@@ -9,10 +9,10 @@ import GridiconCross from 'gridicons/dist/cross';
 /*
  * React component for rendering title bar
  */
-export const Title = ( { onCloseChat, translate } ) => (
-	<div className="happychat__title">
-		<div className="happychat__active-toolbar">
-			<h4>{ translate( 'Support Chat' ) }</h4>
+export const Title = ( { onCloseChat } ) => (
+	<div className="title__wrapper">
+		<div className="title__active-toolbar">
+			<h4>{ 'Support Chat' }</h4>
 			<div onClick={ onCloseChat }>
 				<GridiconCross />
 			</div>
diff --git a/src/ui/components/title/style.scss b/src/ui/components/title/style.scss
index f6b92ef4..7e5c103c 100644
--- a/src/ui/components/title/style.scss
+++ b/src/ui/components/title/style.scss
@@ -1,10 +1,18 @@
 /** @format */
+.title__wrapper {
+	cursor: default;
+	padding: 0;
+	background: $blue-medium;
+	border-bottom: 1px solid darken( $blue-medium, 5% );
+	color: $white;
+	flex: 0 0 auto;
+	display: flex;
+	align-items: center;
+	line-height: 32px;
+	line-height: 46px;
+}
 
-/**
- * Live chat
- */
-
-.happychat__active-toolbar {
+.title__active-toolbar {
 	display: flex;
 	flex: 1 1 auto;
 
diff --git a/src/ui/css/_main.scss b/src/ui/css/_main.scss
index 1db465b0..8bcddfc8 100644
--- a/src/ui/css/_main.scss
+++ b/src/ui/css/_main.scss
@@ -13,6 +13,10 @@ body {
 	margin: 1; // separate from iframe, so children can style the borders
 }
 
+body.is-fullscreen {
+	margin: 0;
+}
+
 a,
 a:visited {
 	color: var(--focused);
diff --git a/targets/wordpress/class-happychat-client.php b/targets/wordpress/class-happychat-client.php
index 033e40e4..7dac8ca8 100644
--- a/targets/wordpress/class-happychat-client.php
+++ b/targets/wordpress/class-happychat-client.php
@@ -87,7 +87,7 @@ private function validate_path( $path ) {
 	private function get_happychat_settings() {
 		$happychat_settings = [
 			'accessToken'  => null,
-			'entry'        => 'ENTRY_FORM',
+			'entry'        => 'form',
 			'entryOptions' => [],
 			'groups'       => [ get_option( 'happychat_user_group' ) ],
 			'canChat'      => 'true',