diff --git a/core/modules/outside_in/outside_in.module b/core/modules/outside_in/outside_in.module
index a7fab7b..9eba1ce 100644
--- a/core/modules/outside_in/outside_in.module
+++ b/core/modules/outside_in/outside_in.module
@@ -10,6 +10,7 @@
 use Drupal\outside_in\Block\BlockEntityOffCanvasForm;
 use Drupal\outside_in\Form\SystemBrandingOffCanvasForm;
 use Drupal\outside_in\Form\SystemMenuOffCanvasForm;
+use Drupal\outside_in\Form\SearchBlockOffCanvasForm;
 
 /**
  * Implements hook_help().
@@ -133,6 +134,10 @@ function outside_in_block_alter(&$definitions) {
     $definitions['system_branding_block']['forms']['offcanvas'] = SystemBrandingOffCanvasForm::class;
   }
 
+  if (!empty($definitions['search_form_block'])) {
+    $definitions['search_form_block']['forms']['offcanvas'] = SearchBlockOffCanvasForm::class;
+  }
+
   // Since menu blocks use derivatives, check the definition ID instead of
   // relying on the plugin ID.
   foreach ($definitions as &$definition) {
diff --git a/core/modules/outside_in/src/Block/BlockEntityOffCanvasForm.php b/core/modules/outside_in/src/Block/BlockEntityOffCanvasForm.php
index 0fec45c..e674d73 100644
--- a/core/modules/outside_in/src/Block/BlockEntityOffCanvasForm.php
+++ b/core/modules/outside_in/src/Block/BlockEntityOffCanvasForm.php
@@ -7,6 +7,7 @@
 use Drupal\Core\Block\BlockPluginInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Plugin\PluginWithFormsInterface;
+use Drupal\Core\Render\Element\Form;
 
 /**
  * Provides form for block instance forms when used in the off-canvas tray.
@@ -52,10 +53,31 @@ public function form(array $form, FormStateInterface $form_state) {
     // Remove the ID and region elements.
     unset($form['id'], $form['region'], $form['settings']['admin_label']);
 
+    // Only show the label input if the label will be shown on the page.
+    $form['settings']['label_display']['#weight'] = -100;
+    $form['settings']['label']['#states']['visible'] = [
+      ':input[name="settings[label_display]"]' => ['checked' => TRUE],
+    ];
+
+    $form['settings']['label']['#process'][] = [get_class($this), 'processLabelInput'];
     return $form;
   }
 
   /**
+   * Element process callback for block label element.
+   *
+   * Checks to make sure the label has a value even if it was set to invisible
+   * on the form via javascript.
+   */
+  public static function processLabelInput(&$element, FormStateInterface &$form_state, array &$form) {
+    $input = $form_state->getUserInput();
+    if (isset($input['settings']['label']) && empty($input['settings']['label_display'])) {
+      $element['#value'] = $element['#default_value'];
+    }
+    return $element;
+  }
+
+  /**
    * {@inheritdoc}
    */
   protected function actions(array $form, FormStateInterface $form_state) {
diff --git a/core/modules/outside_in/src/Form/OffCanvasPluginFormBase.php b/core/modules/outside_in/src/Form/OffCanvasPluginFormBase.php
new file mode 100644
index 0000000..54ef735
--- /dev/null
+++ b/core/modules/outside_in/src/Form/OffCanvasPluginFormBase.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace Drupal\outside_in\Form;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Plugin\PluginFormBase;
+
+/**
+ * Provides a base class for off-canvas block plugin forms.
+ *
+ * Classes extending this most be registered as the 'offcanvas' form handler for
+ * the related block plugin.
+ *
+ * @see outside_in_block_alter()
+ */
+abstract class OffCanvasPluginFormBase extends PluginFormBase {
+
+  /**
+   * The plugin.
+   *
+   * @var \Drupal\Core\Block\BlockPluginInterface
+   */
+  protected $plugin;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    return $this->plugin->buildConfigurationForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+    $this->plugin->submitConfigurationForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+    $this->plugin->validateConfigurationForm($form, $form_state);
+  }
+
+}
+
diff --git a/core/modules/outside_in/src/Form/SearchBlockOffCanvasForm.php b/core/modules/outside_in/src/Form/SearchBlockOffCanvasForm.php
new file mode 100644
index 0000000..033a8bd
--- /dev/null
+++ b/core/modules/outside_in/src/Form/SearchBlockOffCanvasForm.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Drupal\outside_in\Form;
+
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Routing\RedirectDestinationInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Core\Url;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * The off-canvas form handler for the SearchBlock.
+ *
+ * @see outside_in_block_alter()
+ */
+class SearchBlockOffCanvasForm extends OffCanvasPluginFormBase implements ContainerInjectionInterface {
+
+  use StringTranslationTrait;
+
+  /**
+   * The redirect destination service.
+   *
+   * @var \Drupal\Core\Routing\RedirectDestinationInterface
+   */
+  protected $redirectDestination;
+
+  /**
+   * SearchBlockOffCanvasForm constructor.
+   *
+   * @param \Drupal\Core\Routing\RedirectDestinationInterface $redirect_destination
+   *   The redirect destination service.
+   */
+  public function __construct(RedirectDestinationInterface $redirect_destination) {
+    $this->redirectDestination = $redirect_destination;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('redirect.destination')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form = parent::buildConfigurationForm($form, $form_state);
+    $form['search_config_link'] = [
+      '#type' => 'link',
+      '#title' => $this->t('Site search configuration'),
+      '#url' => Url::fromRoute('entity.search_page.collection', [], ['query' => ['destination' => $this->redirectDestination->get()]]),
+      '#weight' => 110,
+    ];
+    return $form;
+  }
+
+}
diff --git a/core/modules/outside_in/src/Form/SystemBrandingOffCanvasForm.php b/core/modules/outside_in/src/Form/SystemBrandingOffCanvasForm.php
index 063041d..b611905 100644
--- a/core/modules/outside_in/src/Form/SystemBrandingOffCanvasForm.php
+++ b/core/modules/outside_in/src/Form/SystemBrandingOffCanvasForm.php
@@ -13,14 +13,7 @@
  *
  * @see outside_in_block_alter()
  */
-class SystemBrandingOffCanvasForm extends PluginFormBase implements ContainerInjectionInterface {
-
-  /**
-   * The block plugin.
-   *
-   * @var \Drupal\Core\Block\BlockPluginInterface
-   */
-  protected $plugin;
+class SystemBrandingOffCanvasForm extends OffCanvasPluginFormBase implements ContainerInjectionInterface {
 
   /**
    * The config factory.
@@ -52,7 +45,7 @@ public static function create(ContainerInterface $container) {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form = $this->plugin->buildConfigurationForm($form, $form_state);
+    $form = parent::buildConfigurationForm($form, $form_state);
 
     $form['block_branding']['#type'] = 'details';
     $form['block_branding']['#weight'] = 10;
@@ -85,20 +78,13 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
   /**
    * {@inheritdoc}
    */
-  public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
-    $this->plugin->validateConfigurationForm($form, $form_state);
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
     $site_info = $form_state->getValue('site_information');
     $this->configFactory->getEditable('system.site')
       ->set('name', $site_info['site_name'])
       ->set('slogan', $site_info['site_slogan'])
       ->save();
-    $this->plugin->submitConfigurationForm($form, $form_state);
+    parent::submitConfigurationForm($form, $form_state);
   }
 
 }
diff --git a/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php b/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php
index 34731f8..6fb6acf 100644
--- a/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php
+++ b/core/modules/outside_in/src/Form/SystemMenuOffCanvasForm.php
@@ -21,19 +21,12 @@
  *
  * @see outside_in_block_alter()
  */
-class SystemMenuOffCanvasForm extends PluginFormBase implements ContainerInjectionInterface {
+class SystemMenuOffCanvasForm extends OffCanvasPluginFormBase implements ContainerInjectionInterface {
 
   use StringTranslationTrait;
   use RedirectDestinationTrait;
 
   /**
-   * The plugin.
-   *
-   * @var \Drupal\Core\Block\BlockPluginInterface
-   */
-  protected $plugin;
-
-  /**
    * @var \Drupal\system\MenuInterface
    */
   protected $entity;
@@ -76,9 +69,10 @@ public static function create(ContainerInterface $container) {
    * {@inheritdoc}
    */
   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
-    $form = $this->plugin->buildConfigurationForm([], $form_state);
+    $form = parent::buildConfigurationForm($form, $form_state);
     // Move the menu levels section to the bottom.
     $form['menu_levels']['#weight'] = 100;
+    $form['menu_levels']['#open'] = FALSE;
 
     $form['entity_form'] = [
       '#type' => 'details',
@@ -118,7 +112,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
    * {@inheritdoc}
    */
   public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
-    $this->plugin->validateConfigurationForm($form, $form_state);
+    parent::validateConfigurationForm($form, $form_state);
     $this->getEntityForm($this->entity)->validateForm($form, $form_state);
   }
 
@@ -126,7 +120,7 @@ public function validateConfigurationForm(array &$form, FormStateInterface $form
    * {@inheritdoc}
    */
   public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
-    $this->plugin->submitConfigurationForm($form, $form_state);
+    parent::submitConfigurationForm($form, $form_state);
     $this->getEntityForm($this->entity)->submitForm($form, $form_state);
     $this->entity->save();
   }