diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -50,7 +50,7 @@
     'rsrc/css/application/conpherence/notification.css' => '6cdcc253',
     'rsrc/css/application/conpherence/transaction.css' => '2c71247c',
     'rsrc/css/application/conpherence/update.css' => 'faf6be09',
-    'rsrc/css/application/conpherence/widget-pane.css' => 'c689f6a4',
+    'rsrc/css/application/conpherence/widget-pane.css' => 'a131d5b6',
     'rsrc/css/application/contentsource/content-source-view.css' => '4b8b05d4',
     'rsrc/css/application/countdown/timer.css' => '16c52f5c',
     'rsrc/css/application/daemon/bulk-job.css' => 'df9c1d4a',
@@ -581,7 +581,7 @@
     'conpherence-thread-manager' => '01774ab2',
     'conpherence-transaction-css' => '2c71247c',
     'conpherence-update-css' => 'faf6be09',
-    'conpherence-widget-pane-css' => 'c689f6a4',
+    'conpherence-widget-pane-css' => 'a131d5b6',
     'd3' => 'a11a5ff2',
     'differential-changeset-view-css' => '9ef7d354',
     'differential-core-view-css' => '5b7b8ff4',
diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2216,6 +2216,7 @@
     'PhabricatorConpherenceNotificationsSetting' => 'applications/settings/setting/PhabricatorConpherenceNotificationsSetting.php',
     'PhabricatorConpherencePreferencesSettingsPanel' => 'applications/settings/panel/PhabricatorConpherencePreferencesSettingsPanel.php',
     'PhabricatorConpherenceThreadPHIDType' => 'applications/conpherence/phid/PhabricatorConpherenceThreadPHIDType.php',
+    'PhabricatorConpherenceWidgetVisibleSetting' => 'applications/settings/setting/PhabricatorConpherenceWidgetVisibleSetting.php',
     'PhabricatorConsoleApplication' => 'applications/console/application/PhabricatorConsoleApplication.php',
     'PhabricatorConsoleContentSource' => 'infrastructure/contentsource/PhabricatorConsoleContentSource.php',
     'PhabricatorContentSource' => 'infrastructure/contentsource/PhabricatorContentSource.php',
@@ -6973,6 +6974,7 @@
     'PhabricatorConpherenceNotificationsSetting' => 'PhabricatorSelectSetting',
     'PhabricatorConpherencePreferencesSettingsPanel' => 'PhabricatorEditEngineSettingsPanel',
     'PhabricatorConpherenceThreadPHIDType' => 'PhabricatorPHIDType',
+    'PhabricatorConpherenceWidgetVisibleSetting' => 'PhabricatorInternalSetting',
     'PhabricatorConsoleApplication' => 'PhabricatorApplication',
     'PhabricatorConsoleContentSource' => 'PhabricatorContentSource',
     'PhabricatorContentSource' => 'Phobject',
diff --git a/src/applications/conpherence/controller/ConpherenceViewController.php b/src/applications/conpherence/controller/ConpherenceViewController.php
--- a/src/applications/conpherence/controller/ConpherenceViewController.php
+++ b/src/applications/conpherence/controller/ConpherenceViewController.php
@@ -12,6 +12,29 @@
   protected function buildApplicationCrumbs() {
     $crumbs = $this->buildConpherenceApplicationCrumbs();
     $crumbs->setBorder(true);
+
+    $widget_key = PhabricatorConpherenceWidgetVisibleSetting::SETTINGKEY;
+    $user = $this->getViewer();
+    $widget_view = (bool)$user->getUserSetting($widget_key, false);
+
+    $divider = id(new PHUIListItemView())
+      ->setType(PHUIListItemView::TYPE_DIVIDER);
+    $crumbs->addAction($divider);
+
+    // How to save this?
+    $crumbs->addAction(
+      id(new PHUIListItemView())
+      ->setHref('#')
+      ->setIcon('fa-columns')
+      ->addSigil('jx-toggle-class')
+      ->addSigil('has-tooltip')
+      ->setMetaData(array(
+        'tip' => pht('Toggle Widgets'),
+        'map' => array(
+          'conpherence-main-layout' => 'hide-widgets',
+        ),
+      )));
+
     return $crumbs;
   }
 
diff --git a/src/applications/conpherence/view/ConpherenceLayoutView.php b/src/applications/conpherence/view/ConpherenceLayoutView.php
--- a/src/applications/conpherence/view/ConpherenceLayoutView.php
+++ b/src/applications/conpherence/view/ConpherenceLayoutView.php
@@ -55,12 +55,18 @@
     return $this;
   }
 
+  public function getWidgetColumnVisible() {
+    $widget_key = PhabricatorConpherenceWidgetVisibleSetting::SETTINGKEY;
+    $user = $this->getUser();
+    return (bool)$user->getUserSetting($widget_key, false);
+  }
+
   public function render() {
     require_celerity_resource('conpherence-menu-css');
     require_celerity_resource('conpherence-message-pane-css');
     require_celerity_resource('conpherence-widget-pane-css');
 
-    $layout_id = celerity_generate_unique_node_id();
+    $layout_id = 'conpherence-main-layout';
 
     $selected_id = null;
     $selected_thread_id = null;
@@ -90,9 +96,13 @@
         'hasWidgets' => false,
       ));
 
-    $class = null;
+    $classes = array();
     if (!$this->getUser()->isLoggedIn()) {
-      $class = 'conpherence-logged-out';
+      $classes[] = 'conpherence-logged-out';
+    }
+
+    if (!$this->getWidgetColumnVisible()) {
+      $classes[] = 'hide-widgets';
     }
 
     $this->initBehavior(
@@ -105,7 +115,7 @@
         'id'    => $layout_id,
         'sigil' => 'conpherence-layout',
         'class' => 'conpherence-layout '.
-                    $class.
+                    implode(' ', $classes).
                     ' conpherence-role-'.$this->role,
       ),
       array(
diff --git a/src/applications/settings/setting/PhabricatorConpherenceWidgetVisibleSetting.php b/src/applications/settings/setting/PhabricatorConpherenceWidgetVisibleSetting.php
new file mode 100644
--- /dev/null
+++ b/src/applications/settings/setting/PhabricatorConpherenceWidgetVisibleSetting.php
@@ -0,0 +1,12 @@
+<?php
+
+final class PhabricatorConpherenceWidgetVisibleSetting
+  extends PhabricatorInternalSetting {
+
+  const SETTINGKEY = 'conpherence-widget';
+
+  public function getSettingName() {
+    return pht('Conpherence Widget Pane Visible');
+  }
+
+}
diff --git a/webroot/rsrc/css/application/conpherence/widget-pane.css b/webroot/rsrc/css/application/conpherence/widget-pane.css
--- a/webroot/rsrc/css/application/conpherence/widget-pane.css
+++ b/webroot/rsrc/css/application/conpherence/widget-pane.css
@@ -190,3 +190,18 @@
   width: 60px;
   margin: 0 auto 0 auto;
 }
+
+/****** Hide Widgets **********************************************************/
+
+.device-desktop .hide-widgets .conpherence-widget-pane {
+  display: none;
+}
+
+.device-desktop .hide-widgets .conpherence-message-pane,
+.device-desktop .hide-widgets .loading .messages-loading-mask,
+.device-desktop .hide-widgets .loading .messages-loading-icon,
+.device-desktop .hide-widgets .conpherence-no-threads,
+.device-desktop .hide-widgets .conpherence-message-pane .conpherence-messages,
+.device-desktop .hide-widgets .conpherence-message-pane .phui-form-view {
+  right: 0;
+}