Adding new font t ZEBRA TLP3842

Hi,
I'm currently using a TLP3842 printer (ZEBRA) to print labels with
barcodes and human readable texts (copy text files to the printer
containing EPL2 commands)
I would like to use a different font than the one which is used by the
printer.
Do you know how I can do this?
I've read the EPL2 manual but it's not clear about this point.
Thanks for your help