How do I perform printhead alignment on the HP Smart Tank 580?

After loading paper, wait for the alignment page to print automatically. When the Open Lid light blinks, open the scanner lid and place the printed page face-down on the scanner glass, aligned to the indicated corner, then close the lid. Press the blinking copy button to scan the page; the icon 'A' will blink during the scan and disappear when alignment is complete. (Page 5)