khosb/modules/invoice/media/css/pages/invoice.css

#watermark {
	color: #800000;
	font-size: 4em;
	-webkit-transform: rotate(-45deg);
	-moz-transform: rotate(-45deg);
	position: absolute;
	width: 100%;
	height: 100%;
	margin: 0;
	z-index: 1;
	left:350px;
	top:-50px;
}