diff --git a/atlas/templates/atlas/collection_mark_question.html b/atlas/templates/atlas/collection_mark_question.html
index e0b319a4..6cc941c3 100644
--- a/atlas/templates/atlas/collection_mark_question.html
+++ b/atlas/templates/atlas/collection_mark_question.html
@@ -35,10 +35,6 @@
 
     <div class="offcanvas offcanvas-top h-auto" data-bs-scroll="true" tabindex="-1" id="offcanvasTop" aria-labelledby="offcanvasTopLabel">
         <div class="offcanvas-header">
-            <h5 id="offcanvasTopLabel">Offcanvas top</h5>
-            <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
-        </div>
-        <div class="offcanvas-body">
         {% for series in series_list %}
             <span class="series-block">
                 <span>
@@ -49,9 +45,12 @@
                 </span>
             </span>
         {% endfor %}
+            <button type="button" class="btn-close text-reset" data-bs-dismiss="offcanvas" aria-label="Close"></button>
+        </div>
+        <div class="offcanvas-body">
 
     <div>
-        <div id="single-dicom-viewer" class="dicom-viewer" data-images="" data-annotations=''>
+        <div id="single-dicom-viewer" height="500px" class="dicom-viewer" data-images="" data-annotations=''>
         </div>
 
     </div>