The Knob widget creates an on-screen round dial that when clicked or touched, outputs a value corresponding to the position on the dial.
Use the “drag” handle to move the knob to your desired position on the screen. The position of the touchable knob is independent of the widget, and when the widget is hidden, the knob will stay visible.
NOTE: This widget is currently in a primitive state, and will be improved to provide more control of the visual appearance of the knob.