Tally T5023+ Programming Manual page 136

Character set selection
Basic character set:
After entry of the control commands ESC 4 ('Switching on italic printing') and
ESC ! (64) ('Selection of combined print modes') all the basic character symbols
of the currently selected print quality or LQ type font are printed in italics.
The lower control code table is occupied by control codes (hex 00 to 1F
i
or decimal 0 to 31). It contains no printable characters. An exception is
the character '§' (hex 15, decimal 21) by which the lower control code
table is extended.
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T5023/5023+ - Programming Guide
Character set commands