HP 2 - Manual (Page 34)

printing a booklet
Booklet printing automatically arranges and resizes the pages of a document so when
the document is folded into a booklet, the page order is correct.
For example, if a four-page booklet was printed on both sides of the paper, the pages
would be reordered and printed like this:
To print a booklet, follow these steps:
1. Open the Printer Properties dialog box.
2. Select the Finishing tab.