User's Guide Printer Basics 14 A Ink cartridge holder Install the ink cartridges. Ink is ejected from the print head nozzles underneath. B Scanner unit Scans placed originals. Open to replace ink cartridges or to remove jammed paper. This unit should usually be kept closed. C Memory card slot Insert a memory card. D Control Panel Operates the printer. A Document cover Blocks external light while scanning. B Scanner glass Place the originals.