HP 5961-0509 manual Terminating Labels

These lines use one (X,Y) coordinate pair, one LO command to center labels, and a Carriage Return and Line Feed after each line. Without this command, an alternative method would involve calculating the length of the line in CP (Character Plot) cells, dividing by two, and using the CP command to ‘Backspace’ the required number of cells. The LO command saves calculation, decreases the number of characters sent to the printer, and allows you to take advantage of proportional fonts when the character widths are not known to the software.

Terminating Labels

LB tells the printer to print every character following the command, rather than interpreting the characters as graphics commands. In order to allow the normal terminator, the semicolon (;), to be used in text, the command is defined so that you must use the special ‘print label terminator mode’ to tell the printer to once again interpret characters as graphics commands. (If the command had been defined otherwise, you wouldn’t be able to print semicolons in your text.)

The default label terminator is the non-printing ASCII end-of-text character ETX (decimal code 3). You must use the label terminator, or the printer prints the rest of your file as text instead of executing the commands. You can change the label terminator using the Define Label Terminator (DT) command.

EN Enhancing Labels 23-11