Hi Alexandre,
 
 Here is a solution for you:
 
 1 Open HTML component properties.
 
 2 Set dimensions: as "auto" and "auto". http://prntscr.com/4wlwvb/direct
 
 3 Set for this HTML component "Class Name" property as "fullScreen" http://prntscr.com/4wlwpp/direct
 
 4 Create new CSS. And fill it by following code:
 
 pre
 
 .fullScreen{ 
     position: absolute; 
     left: 0px; 
     right: 0px; 
     /* you need to adjust it for header / 
     top: 54px; 
     / you need to adjust it for footer */ 
     bottom: 54px; 
     width: auto; 
     height: auto; 
 }
 
 /pre
 
 5 Click "Edit HTML" for this HTML component and fill it with following code: http://prntscr.com/4wlxir/direct
 
 pre
 
 <iframe src="http://appery.io" width="100%" height="100%"</iframe
 
 /pre
 
 That's all.
 
 Regards.