diff --git a/testserver_o2b/views/views.xml b/testserver_o2b/views/views.xml
index 9dbb779..f8d92d0 100644
--- a/testserver_o2b/views/views.xml
+++ b/testserver_o2b/views/views.xml
@@ -67,8 +67,7 @@
         <field name="model">testserver_o2b.testserver_o2b</field>
         <field name="arch" type="xml">
           <form string="Embedded Mailcatcher" version="7.0" edit="false" create="false"> 
-              <!--<div class="embed-responsive embed-responsive-4by3">-->
-              <div class="embed-responsive">
+              <div class="embed-responsive embed-responsive-4by3" style="height: 100%;">
                   <iframe class="embed-responsive-item" src="https://www.odoo.com/documentation" width="100%" height="100%"/>
               </div>     
           </form>