How do I activate the dual element on my cooktop?

To turn on both the inner and outer elements together, push down on the control knob and turn it clockwise past the number 9 setting to the dual element marker. The dual ON indicator light will glow, confirming that the dual element is on. Then turn the knob counterclockwise to your desired heat setting. To turn off the dual element, turn the knob to the OFF position. (Page 6)