The HP All-in-One at a glance HP All-in-One overview Basics Guide 3 Label Description 1 Control panel 2 On button 3 P P hotosmart Express button (left) and roof Sheet button (right) 4 Memory card slots 5 I nput tray 6 P aper tray extender 7 P aper-width guide 8 P rint cartridge door 9 Glass 10 L id backing