The HP LaserJet 4x50 series drivers are supposed to offer N-up

When these printers are used via iPrint this Finishing option is not

However, with the very same driver (PCL6), if you connect to the
printer via a Standard TCP/IP port the option becomes available.

I don't know if this is a compatibility problem or an iPrint
configuration issue.

Specifically, we would like to be able to print N-up printing.

Any suggestions?