chalkboard: {
				src: "chalkboard.json",
				readOnly: undefined,
				transition: 800,
				theme: "whiteboard",
				//toggleChalkboardButton: { left: "30px", bottom: "30px", top: "auto", right: "auto" },
				//toggleNotesButton: { left: "30px", bottom: "30px", top: "auto", right: "auto" },
				// configuration options for notes canvas and chalkboard
				color: ['rgba(0,0,255,1)', 'rgba(255,255,255,0.5)'],
				background: ['rgba(127,127,127,.1)', '../../slides/plugin/chalkboard/img/whiteboard.png'],
				pen