body,
html {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
}

#myDropzone {
  height: 100%;
  width: 100%;
  border: 0;
  padding: 0;
  position: absolute;
  top: 0;
  left: 0;
}
.dz-message {
  height: 100%;
  margin: 0 !important;
  display: flex;
  justify-content: center;
  align-items: center;
  background: grey;
}
.noShow {
  opacity: 0;
}

#imageHolder > img {
  max-width: 300px;
  max-height: 300px;
}