Lexmark T640 Technical Reference page 404

forward/backward compatibility modes 2-11
U
Universal Exit Language 3-2
V
variables, PJL
common for all printer languages 3-12
common for PCL emulation 3-48
common for PostScript emulation 3-51
environment 3-7
printer unique for all printer languages 3-19
printer unique for PCL emulation 3-49
W
weight, printer 7-3
whole page setting 2-6
X
XON/XOFF protocol 8-23
RS-232C 8-26
X-15
Index