@media print {
  
  #header, #lateral, #backbt, #printbt, #footer {
    display: none;
  }
  
  .btn_print, .btn_export, .btn_back, .logout, .btn_all {
    display: none;
  }
  
  .app_box img {
    display: none;
  }
  
  #logotipo, #titular {
    display: block;
  }
  
}