HP 4 FAMILY - Manual (Page 97)

language. If resource saving is enabled, all the
permanent fonts, macros, and user-defined patterns plus
other miscellaneous data is saved in a reserved portion of
printer memory. This data is stored until the language is
enabled again. When the language is re-enabled, the
stored data is made available for use. Resource saving is
enabled from the control panel or using PJL—no PCL
commands are required for this operation.
EconoMode, a feature supported by HP LaserJet 4L and
4P printers, allows the user to reduce the amount of
toner used by removing about 75% of the dots from the
printed page. EconoMode is selected using PJL or from
the control panel—it is not controlled using PCL.
Powersave mode, which minimizes power consumption
when the printer is sitting idle. The amount of idle time
required before the printer goes into powersave mode is
configurable using the control panel or PJL.
PCL operation in these two printers is almost identical to
that of HP LaserJet 4 and 4M printers, except HP LaserJet
4 Plus and 4M Plus printers support Logical Operations
(ROP3) as explained in the HP LaserJet 4ML printer
section in this chapter. In addition, the internal fonts in
HP LaserJet Plus and 4M Plus printers support the Latin 2
and Latin 5 symbol sets for all typefaces (in the HP
LaserJet 4, 4M, 4Si, and 4SiMx, only 15 of the 35 Intellifont
typefaces support these symbol sets). Refer to Table 1-1,
PCL Feature Support Matrix, for the commands these
printers support and to Chapter 3, “Internal
Typefaces/Fonts and Symbol Sets,” for font support
information.
Printer-Specific Differences 2-61