HP LaserJet Pro M435 Multifunction Printer series - Manual (Page 39)

Manually print on both sides (Windows)
Use this procedure for products that do not have an automatic duplexer installed or to print on paper that the
duplexer does not support.
1. From the software program, select the Print
option.
2. Select the product from the list of printers, and
then click or tap the Properties or Preferences
button to open the print driver.
NOTE: The name of the button varies for
different software programs.
3. Click or tap the Finishing tab.
ENWW Print tasks (Windows) 31