Dell B2375dfw Mono Multifunction Printer - Manual (Page 187)

2 Place the document face down on the document glass and align it with the
registration guide on the top left corner of the glass.
For detailed guidelines for preparing an original document, see "Preparing a
Document".
3 Close the document cover.
NOTE: If you are copying a page from a book or magazine, lift the cover until
its hinges are caught by the stopper and then close the cover. If the book or
magazine is thicker than 30 mm, start copying with the cover open.
NOTE: Leaving the cover open while copying may affect the copy quality and
toner consumption.
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