Dell 1355cnw, 1355CN manual 152, Values Resolution Standard, Super Fine, Ultra Fine

Sharpness	Sets the default sharpness level.
Auto Exposure	Sets whether to suppress the background of the original to enhance
	text on the scanned image.
Margin	Sets the value of the top and bottom margins within the range of 0
Top/Bottom	mm to 50 mm/0.0 to 2.0 inch.
Margin	Sets the value of the left and right margins within the range of 0
Left/Right	mm to 50 mm/0.0 to 2.0 inch.
Margin Middle	Sets the value of the middle margin within the range of 0 mm to 50
	mm/0.0 to 2.0 inch.
Image	Sets the image compression level.
Compression
Max E-Mail	Sets the maximum size of e-mail that can be sent, within the range
Size	of 50 K bytes to 16384 K bytes. The default is 2048 K bytes.
Fax Defaults
Purpose:

To create your own default Fax settings.

NOTE: Values marked by an asterisk (*) are the factory default menu settings.

Values:

Resolution	Standard*	Suitable for documents with normal sized
		characters.
	Fine	Suitable for documents containing small
		characters or thin lines or documents printed
		using a dot-matrix printer.
	Super Fine	Suitable for documents containing extremely fine
		detail. The super fine mode is enabled only if the
		remote machine also supports the super fine
		resolution.
	Ultra Fine	Suitable for documents containing photographic
		images.
Lighter/Darker	Sets the default density level to be used for fax transmission.
Delayed Start	Sets the fax transmission start time when sending a fax at a
	specified time.

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Dell Printer Configuration Web Tool