Epson AcuLaser C4000 Owner's Manual page 220

Code Page
Selects the character tables. Character tables contain the
characters and symbols used by different languages. The printer
prints text based on the selected character table.
T. Margin
Sets the distance from the top of the page to the baseline of the
first printable line. The distance is measured in inches. The
smaller the value, the closer the printable line is to the top.
Text
Sets the page length in lines. For this option, a line is assumed to
be 1 pica (1/6 inch). If you change the Orientation, Page Size,
or T. Margin settings, the page length setting automatically
returns to the default for each paper size.
Auto CR
Specifies whether the printer performs a
carriage-return/line-feed (CR-LF) operation whenever the
printing position goes beyond the right margin. If this setting is
off, the printer does not print any characters beyond the right
margin and does not perform any line wrapping until it receives
a carriage-return character. This function is handled
automatically by most applications.
Auto LF
If you select Off, the printer does not send an automatic line-feed
(LF) command with each carriage-return (CR). If On is selected, a
line-feed command is sent with each carriage-return. Select On if
your text lines overlap.
Alt.Graphics
Turns the Alternate Graphics option on or off.
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Functions of the Control Panel