HP 4500 HP Color LaserJet 4500, 4500N, 4500DN Printer User Guide - Page 177
Interpreting PCL Printer Command Syntax, Printer Command Elements
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Interpreting PCL Printer Command Syntax Note Before using printer commands, compare the following characters: Lowercase L: l Number one: 1 Uppercase O: O Number zero: 0 You must use the exact character and case specified for PCL printer commands. 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. Figure B-1 shows the elements of a typical printer command (in this example, a command for page orientation). Figure B-1 Printer Command Elements 1 Escape Character (begins the escape sequence) 2 Value Field (contains both alpha and numeric characters) 3 Category of Command 4 Uppercase Letter (terminates the escape sequence) EN Appendix B 177