Lexmark 642, 644, 640 manual Menu selection Purpose Values†, Driver option Purpose Values†

Troubleshooting

The quality menu operator panel options can be adjusted to help improve print quality.

Menu selection	Purpose	Values†
Print Resolution	To select printed output resolution	600 dpi*
		1200 Image Q
		1200 dpi
		2400 Image Q
Toner Darkness	Lightens or darkens printed output and	1–10	8* is the default setting.
	conserves toner		Select a lower number to lighten the
			printed output or save toner.
Brightness	Adjusts the gray value of printed	-6 – +6	0* is the default setting.
	objects
Contrast	Adjusts the contrast of printed objects	0–5	0* is the default setting.

† Values marked by an asterisk (*) are the factory default settings.

In addition, the Enhance Fine Lines and Gray Correction options can be enabled to improve print quality. These settings are available on the driver and on the printer Embedded Web Server (EWS) interface. For more information about these options, see the driver Help.

Driver option	Purpose	Values†
Enhance Fine Lines	A selection to enable a print mode	On	In the driver, enable the check box.
	preferable for certain files containing
		Off*	In the driver, disable the check box.
	fine line detail, such as architectural
	drawings, maps, electronic circuit
	diagrams, and flow charts
Gray Correction	Automatically adjusts the contrast	Auto	In the driver, enable the check box.
	enhancement applied to images
		Off*	In the driver, disable the check box.

† Values marked by an asterisk (*) are the factory default settings.

Solving print quality problems

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