HP Color LaserJet 4650 Printer series - Manual (Page 115)

Note If total sheets exceed the Tray 1 capacity for manual duplex jobs, feed the top 100 sheets
and press . When prompted, feed the next 100 sheets and press . Repeat as necessary
until all the sheets from the output stack have been loaded into Tray 1.
For more information about how to access the printer drivers, see Accessing the printer drivers .
Printing booklets
Some versions of the printer driver let you control the printing of booklets when duplexing.
You can select binding on the left or right side on letter, legal, or A4 paper size. Windows
2000 and XP supports booklet printing for all paper sizes.
See the printer driver online Help for more information about the printing booklets feature.
ENWW Two-sided (duplex) printing 101