Epson MX-82 Operation Manual page 71

(7) ESC E (for emphasized characters)
The ESC E code causes the Printer to print emphasized characters.
Emphasized printing gives the character stronger impression on the paper.
This code can be input in any column position on a line, but all characters on the
line containing ESC E code are printed out in emphasized characters. The speed
of the head carriage reduces to 40 CPS while printing emphasized characters.
(8) ESC F
The ESC F code cancels the emphasized printing mode.
(9) ESC R + n (for international character set)
(0 S n 5 7)
When the "ESC R + n" code is input, all data that follows it will be printed out in a
country character set which is specified by "n". It will be valid until specified by
other "ESC R + n" code.
As for specific code tables and character fonts, refer to Appendixes 4 and 5.
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