Guidelines for printing with different fonts
The 80 internal fonts are available in PostScript Emulation (PS) and PCL mode.
To conserve printer memory, download only those fonts that are needed.
If you require several downloaded fonts, consider installing additional printer memory.
Some software applications automatically download fonts at the beginning of each print job. It might be possible to configure those applications to download only soft fonts that are not already resident in the printer.
HP 3550 3700 Guidelines for printing with different fonts