diff --git a/services/web/app/views/project/editor.jade b/services/web/app/views/project/editor.jade
index bc8016dd86..86088ded50 100644
--- a/services/web/app/views/project/editor.jade
+++ b/services/web/app/views/project/editor.jade
@@ -38,7 +38,7 @@ block content
 
 		include ./editor/left-menu
 
-		#chat-wrapper(
+		#chat-wrapper.full-size(
 			layout="chat",
 			spacing-open="12",
 			spacing-closed="0",
diff --git a/services/web/app/views/project/editor/editor.jade b/services/web/app/views/project/editor/editor.jade
index 07208a6642..4e04bf6753 100644
--- a/services/web/app/views/project/editor/editor.jade
+++ b/services/web/app/views/project/editor/editor.jade
@@ -9,35 +9,45 @@ div.full-size(
 	minimum-restore-size-east="300"
 )
 	.ui-layout-center
-		.loading-panel(ng-show="!editor.sharejs_doc || editor.opening")
-			span(ng-show="editor.open_doc_id")
-				i.fa.fa-spin.fa-refresh
-				|   #{translate("loading")}...
-			span(ng-show="!editor.open_doc_id")
-				i.fa.fa-arrow-left
-				|   #{translate("open_a_file_on_the_left")}
-
-		#editor(
-			ace-editor="editor",
-			ng-show="!!editor.sharejs_doc && !editor.opening"
-			theme="settings.theme",
-			keybindings="settings.mode",
-			font-size="settings.fontSize",
-			auto-complete="settings.autoComplete",
-			spell-check="true",
-			spell-check-language="project.spellCheckLanguage",
-			highlights="onlineUserCursorHighlights[editor.open_doc_id]"
-			show-print-margin="false",
-			sharejs-doc="editor.sharejs_doc",
-			last-updated="editor.last_updated",
-			cursor-position="editor.cursorPosition",
-			goto-line="editor.gotoLine",
-			resize-on="layout:main:resize,layout:pdf:resize",
-			annotations="pdf.logEntryAnnotations[editor.open_doc_id]",
-			read-only="!permissions.write",
-			on-ctrl-enter="recompileViaKey"
-			syntax-validation="settings.syntaxValidation"
+		#review-panel-wrapper.full-size(
+			layout="review"
+			spacing-open="12"
+			spacing-closed="0"
+			init-closed-east="true"
+			open-east="ui.reviewPanelOpen"
 		)
+			.ui-layout-center
+				.loading-panel(ng-show="!editor.sharejs_doc || editor.opening")
+					span(ng-show="editor.open_doc_id")
+						i.fa.fa-spin.fa-refresh
+						|   #{translate("loading")}...
+					span(ng-show="!editor.open_doc_id")
+						i.fa.fa-arrow-left
+						|   #{translate("open_a_file_on_the_left")}
+
+				#editor(
+					ace-editor="editor",
+					ng-show="!!editor.sharejs_doc && !editor.opening"
+					theme="settings.theme",
+					keybindings="settings.mode",
+					font-size="settings.fontSize",
+					auto-complete="settings.autoComplete",
+					spell-check="true",
+					spell-check-language="project.spellCheckLanguage",
+					highlights="onlineUserCursorHighlights[editor.open_doc_id]"
+					show-print-margin="false",
+					sharejs-doc="editor.sharejs_doc",
+					last-updated="editor.last_updated",
+					cursor-position="editor.cursorPosition",
+					goto-line="editor.gotoLine",
+					resize-on="layout:main:resize,layout:pdf:resize,layout:review:resize",
+					annotations="pdf.logEntryAnnotations[editor.open_doc_id]",
+					read-only="!permissions.write",
+					on-ctrl-enter="recompileViaKey"
+					syntax-validation="settings.syntaxValidation"
+				)
+			.ui-layout-east
+				strong Hello world
 
 	.ui-layout-east
 		div(ng-if="ui.pdfLayout == 'sideBySide'")
diff --git a/services/web/public/coffee/ide.coffee b/services/web/public/coffee/ide.coffee
index 01f7363c80..201d324821 100644
--- a/services/web/public/coffee/ide.coffee
+++ b/services/web/public/coffee/ide.coffee
@@ -64,6 +64,7 @@ define [
 			view: "editor"
 			chatOpen: false
 			pdfLayout: 'sideBySide'
+			reviewPanelOpen: false
 		}
 		$scope.user = window.user
 		$scope.settings = window.userSettings
@@ -71,6 +72,9 @@ define [
 
 		$scope.chat = {}
 
+		ide.toggleReviewPanel = () ->
+			$scope.ui.reviewPanelOpen = !$scope.ui.reviewPanelOpen
+			$scope.$digest()
 
 		# Only run the header AB test for newly registered users.
 		_abTestStartDate = new Date(Date.UTC(2016, 8, 28))
diff --git a/services/web/public/stylesheets/app/editor.less b/services/web/public/stylesheets/app/editor.less
index 2db26059c4..4b38201aff 100644
--- a/services/web/public/stylesheets/app/editor.less
+++ b/services/web/public/stylesheets/app/editor.less
@@ -11,6 +11,7 @@
 @import "./editor/publish-template.less";
 @import "./editor/online-users.less";
 @import "./editor/hotkeys.less";
+@import "./editor/review-panel.less";
 
 .full-size {
 	position: absolute;
@@ -34,13 +35,6 @@
 	}
 }
 
-#chat-wrapper {
-	.full-size;
-	> .ui-layout-resizer > .ui-layout-toggler {
-		display: none !important;
-	}
-}
-
 #ide-body {
 	.full-size;
 	top: 40px;
diff --git a/services/web/public/stylesheets/app/editor/chat.less b/services/web/public/stylesheets/app/editor/chat.less
index d702a225fe..d0ad76fe9c 100644
--- a/services/web/public/stylesheets/app/editor/chat.less
+++ b/services/web/public/stylesheets/app/editor/chat.less
@@ -1,5 +1,11 @@
 @new-message-height: 80px;
 
+#chat-wrapper {
+	> .ui-layout-resizer > .ui-layout-toggler {
+		display: none !important;
+	}
+}
+
 .chat {
 	.loading {
 		font-family: @font-family-serif;
diff --git a/services/web/public/stylesheets/app/editor/review-panel.less b/services/web/public/stylesheets/app/editor/review-panel.less
new file mode 100644
index 0000000000..1d7d807028
--- /dev/null
+++ b/services/web/public/stylesheets/app/editor/review-panel.less
@@ -0,0 +1,5 @@
+#review-panel-wrapper {
+	> .ui-layout-resizer > .ui-layout-toggler {
+		display: none !important;
+	}
+}
\ No newline at end of file