How do I start the ink priming process on the HP DeskJet GT 5820?

During initial setup, when the Number of copies icon changes to a blinking P, the printer is ready for priming. Make sure all ink tanks are filled above the minimum line and the blue printhead latch is closed firmly, then press and hold the Resume button for 3 seconds to start ink priming. Priming occurs in the background and will not block printing or copying. (Page 12)