Ubuntu pdf print double sided

duplex printing linux
two sided printing not available ubuntu
linux print bookletcups double sided printing
gnome-manual-duplex
how to print both sides in ubuntu

Just recently downloaded a PDF Service Manual & want to print it two sided; but even though my duplexer is enabled in CUPS & HP Toolbox says Printing options e.g. duplex, n-up printing · In Firefox, Thunderbird and evince, go to the Page Setup tab in the Print dialog and set the "Two sided" option to