User's Guide Printer Basics 13 B Edge guides Feeds the paper straight into the printer. Slide to the edges of the paper. C Paper cassette Loads 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.