                 RevealChalkboard.toggleChalkboard()
                    }, // toggle chalkboard when 'b' is pressed
                    46: function () {
                        RevealChalkboard.clear()
                    }, // clear chalkboard when 'DEL' is pressed
                    8: function () {
                        RevealChalkboard.reset()
                    }, // reset chalkboard data on current slide when 'BACKSPACE' is pressed
                    68: function () {
                        Re