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Appendix D Printer Commands 153
Understanding PCL Printer Command Syntax
Before using printer commands, compare these characters:
Many printer commands use the lowercase letter l (l) and the number
one (1), or the uppercase letter O (O) and the number zero (0). These
characters may not appear on your screen as shown here. You must
use the exact character and case specified for PCL printer
commands.
The following illustration displays the elements of a typical printer
command (in this instance, a command for page orientation).
Lowercase l:
l
Uppercase O:
O
Number one:
1
Number 0:
0
Escape character
(begins escape
sequence)
Value field (contains both
alpha and numeric characters)
Category of command
Uppercase letter
(terminates escape
sequence)
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