User's Guide Printer Basics 13 B Rear paper feed Loads paper. C Paper support Supports loaded paper. D Feeder guard Prevents foreign substance from entering the printer. Usually keep this guard closed. E Output tray Holds the ejected paper. A Document cover Blocks external light while scanning. B Scanner glass Place the originals. C Control panel Operates the printer. A Scanner unit Scans placed originals. Open when replacing ink cartridges or removing jammed paper inside the printer. B Ink cartridge holder Install the ink cartridges. Ink is ejected from the print head nozzles underneath.