HP LaserJet 9000 Printer series - Manual (Page 209)

Appendix D Printer commands 209
Understanding PCL 5e printer command syntax
Understanding PCL 5e 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 5e printer commands.
Combining escape sequences
Escape sequences may be combined into one escape sequence string. There are three important rules to
follow when combining code:
1 The first two characters after the escape character (the parameterized and group characters) must be the
same in all of the commands to be combined.
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)
Termination character
(uppercase) Group
character Parameterized
character