Epson Printer Interface Cartridge for the Apple IIc Operation Manual page 72

In BASIC you can send the command to set the right margin to 60
in three ways:
Decimal :
Hex:
Decimal with quotes:
ESCape sequences that require a 0 or
"Wl" to turn on expanded, can use either the ASCII code or the
numeral in quotation marks for the 0 or
you can turn on expanded with either of the formats below:
PRINT CHR$(27);"Wl"
c-2
PRINT CHR$(27);CHR$(81);CHR$(60)
PRINT CHR$(&H1B);CHR$(&H51);CHR$(&H3C)
PRINT CHR$(27);"Q";CHR$(60)
or
PRINT CHR$(27);"W";CHR$(1)
with a letter, such as ESC
1
For example, in BASIC
1.