Better Trello print style for the most essential info on cards. Use https://chrome.google.com/webstore/detail/styler/bogdgcfoocbajfkjjolkmcdcnnellpkb to install

trello_betterprint.css

@media print {
  body, html {
	height:90% !important;
  }
  
  .window-module {
	display: none;
  }

  .window-cover {
	height:350px !important;
  }

  .window-title-text {
	font-size:30px;
  }

  .window-cover {
	position: absolute !important;
	bottom:0px !important;
  }

  .card-detail-window {
	margin-bottom:350px;
	min-height:400px;
  }

  .window {
	margin-top:20px !important;
	margin-bottom:0px !important;
  }

  .js-current-list {
	display:block !important;
  }
}