diff --git a/addons/website_slides/views/website_slides_templates_homepage.xml b/addons/website_slides/views/website_slides_templates_homepage.xml
index c50d19b724b..4b647aa7cb1 100644
--- a/addons/website_slides/views/website_slides_templates_homepage.xml
+++ b/addons/website_slides/views/website_slides_templates_homepage.xml
@@ -324,7 +324,7 @@
 
 <template id='courses_footer'>
     <section class="s_banner">
-        <div class="oe_structure oe_empty"/>
+        <div class="oe_structure oe_empty" id="oe_structure_website_slides_course_footer_1"/>
     </section>
 </template>
 
diff --git a/addons/website_slides/views/website_slides_templates_lesson.xml b/addons/website_slides/views/website_slides_templates_lesson.xml
index d8c904c28e9..f6bf4f2893b 100644
--- a/addons/website_slides/views/website_slides_templates_lesson.xml
+++ b/addons/website_slides/views/website_slides_templates_lesson.xml
@@ -294,7 +294,8 @@
             <a t-att-href="'/slides/%s/tag/%s' % (slug(slide.channel_id), slug(tag))" class="badge text-bg-info py-1 px-2" t-esc="tag.name"/>
         </t>
     </div>
-    <div class="oe_structure oe_empty"/>
+    <div class="oe_structure oe_empty" id="oe_structure_website_slides_lesson_top_1"
+         data-editor-message="BUILDING BLOCKS DROPPED HERE WILL BE SHOWN ACROSS ALL LESSONS"/>
     <div t-if="slide.slide_category == 'infographic'" class="o_wslides_lesson_content_type" t-field='slide.image_1920' t-options="{'widget': 'image', 'style': 'width: 100%;'}"/>
     <div t-else="" class="o_wslides_lesson_content_type">
         <div t-if="slide.slide_category == 'document'" class="ratio ratio-4x3 embed-responsive-item mb8" style="height: 600px;">