HP LaserJet 6pmp Printer series - Manual (Page 131)

PCL Printer Command Syntax
Before using printer commands, compare these characters:
Lowercase l: l Uppercase O: O
Number one: 1 Number 0: 0
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.
Figure E-1 displays the elements of a typical printer command (in this
instance a command for page orientation).
Printer Command Explanation
1 Escape character (begins escape sequence)
2 Category of command
3 Value field (contains both alpha and numeric characters)
4 Uppercase letter that terminates the escape sequence
Figure E-1
E-2 PCL Printer Commands
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