Dithering Dither General 140 C -dither %s ppmtomd ev/ppmtomd-Dither-Halftone No dithering None None Floyd-Steinberg (not recommended for MicroDry) FloydSteinberg FloydSteinberg Halftone (recommended for general use) Halftone Halftone Square (experimental, not recommended) Square Square More than 4 colours, colours one page at a time MultiColour MultiColour Monochrome printing, standard black cartridge Black Black Monochrome printing, re-usable economy black cartridge EconoBlack EconoBlack