#open_preferences_center {
	width: 				24px; 
	height: 			24px; 
	background-color: 	transparent; 
	position: 			fixed;
    bottom: 			25px;
	right: 				10px;
	border: 			none;
	z-index:			1000;
}

#open_preferences_center:hover {
	cursor: pointer;
}