PostScript Transfer Function
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Dialog Box: PostScript Transfer Function [ Postscript Settings dialog]

The Transfer Function is analogous to the PostScript function of the same name. It changes the nominal gray values (0.0-1.0 for black-white) calculated by SHAPE as true illumination to values actually output. (Note that the PostScript gray scale, 0.0-1.0 for black to white, is in the opposite direction to the SHAPE gray scale, 0-15 for white-black; the transfer function uses the Postscript gray scale.) If your printer gives gray shadings that are too dark (this is common, especially for lighter shades), you can increase the output values. Values in between the listed values are linearly interpolated. The actual gray values output to the printer or EPS file are changed; the transfer function itself is not part of the EPS file. Note that the gray-scale conversion also applies to lines of greater than single-dot width (single-dot lines are always black).