Epson LQ-590 Reference Manual page 130

Packet mode
Make sure to select AUTO when you print from Windows
applications using the printer driver included in the Printer
Software CD-ROM that comes with the printer. Turn this feature
off if you have connection troubles while printing from
applications based on other operating systems such as DOS.
Auto CR (IBM PPDS)
This setting is available only in IBM PPDS emulation mode. When
auto carriage return is on, each line feed (LF) code or ESC J code
is accompanied by a carriage return (CR) code so the printer
moves the next printing position to the left margin. When this
setting is off, you must send a CR code after the line feed code to
move the printing position to the left margin.
A.G.M. (IBM PPDS)
Turn on the alternate graphic mode (A.G.M.) to make the ESC 3,
ESC A, ESC J, ESC K, ESC L, ESC Y, ESC Z, and ESC * commands
in IBM PPDS emulation mode work the same way as in ESC/P 2
mode.
The A.G.M. feature is available only in IBM PPDS emulation
mode.
Character table
You can select among various character tables. This setting is used
when you print without using the printer driver.
When using the printer driver, change the settings on the printer
driver. For details, see "Printer Driver Settings Overview" on
page 78.
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Control Panel