@media screen {

body { overflow:scroll; }
.slide, .preso { margin: 10px; }

}

@media print {

body { background: none; overflow:scroll; }
.slide, .preso {
  margin: 10px;
  padding: 0;
  overflow:hidden;
  border: none;
  page-break-after: always;
  border: 1px solid #333;
}

}