Epson C4100 Reference Manual - Page 351

Auto CR Specifies whether the printer performs a 9 carriage-return/line-feed (CR-LF) operation whenever the 9 printing position goes beyond the right margin. If you select 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. 9 9 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 9 line-feed command is sent with each carriage-return. Select On if your text lines overlap. Bit Image 9 The printer is able to emulate the graphics densities set with the printer commands. If you select Dark, the bit image density is high, and if you select Light, the bit image density is low. 9 If you select BarCode, the printer converts bit images to bar codes 9 by automatically filling in any vertical gaps between dots. This produces unbroken vertical lines that can be read by a bar code reader. This mode will reduce the size of the image being printed, and may also cause some distortion when printing bit image graphics. 9 ZeroChar 9 Selects whether the printer prints a slashed or unslashed zero. 9 I239X Menu The I239X mode emulates IBM® 2390/2391 Plus commands. 9 Functions of the Control Panel 351