HP LaserJet 3100 All-in-One Printer series - Manual (Page 114)

EN 5 Copying 113
Using the Document Assistant instead of the control panel to copy
takes longer because the document is first scanned to the computer
before it is copied. Because the Document Assistant slows down the
copying process, only use it to access special copying features. For
more information on using the Document Assistant, click Help on the
Document Assistant.
Loading paper for copy output
You can copy to a size of media as small as an index card (3 by 5
inch or 76.2 by 127 mm) or as large as a sheet of legal-sized (8.5 by
14 in or 216 by 356 mm) paper. The instructions for loading this
media are the same whether you are printing, faxing, or copying. See
“Loading media” in chapter 4 for loading instructions.
Selecting items to be copied
The guidelines for selecting items are the same whether you are
faxing, copying, or scanning. See “Selecting items for faxing, copying,
and scanning” in chapter 3.