Ricoh 2400L Operator's Manual page 718

ROUTINE OPERATION SENDING A FAX MESSAGE
Contrast
The text and diagrams in your document must stand out clearly from the paper
they are written on. If your document has a darker background than normal (for
example, a newspaper clipping), or if the writing is faint, adjust the contrast.
There are three grades.
Normal: Suitable for most documents
Darken: Use for documents with faint writing (such as those written in pencil)
Lighten: Use for documents that have a dark or patchy background
Resolution
If your document contains fine print or detailed diagrams, use a higher resolution
setting.
Standard: Suitable for most typewritten documents
Detail: Use for documents with small print or fine details
Fine: Use this for high quality reproduction
Halftone
If your document contains a photograph, or diagrams with complex shading
patterns or grays, switch Halftone Mode on to achieve optimum image quality.
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