diff --git a/rapids/templates/rapids/mark.html b/rapids/templates/rapids/mark.html
index 9b9a73e4..f15ea0ce 100644
--- a/rapids/templates/rapids/mark.html
+++ b/rapids/templates/rapids/mark.html
@@ -106,15 +106,14 @@
                         <button type="submit" name="skip" class="save btn btn-default">Skip</button>
                     {% endif %}
                 </span>
-                <p><button class="btn btn-primary" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasTop" aria-controls="offcanvasTop">View/Hide Case</button></p>
                 <span class=hide>
                     {{ form.as_p }}
                 </span>
             </form>
         </div>
     </div>
-    <div  class="col-md-6">
-        <div id="single-dicom-viewer" class="dicom-viewer" data-images="{{question.get_image_url_array}}"
+    <div class="col-md-6">
+        <div id="single-dicom-viewer" class="marking-dicom" data-images="{{question.get_image_url_array}}"
             data-annotations='{{question.get_image_annotations}}'>
         </div>
     </div>