-gray32-lut* n)</TT> returns the pixel value for nth gray-level
out of 32 levels.
</DD>
</DL>
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<A NAME="39188"></A>
<B>*x-gray16-lut*</B> [variable]

<DL COMPACT>
<DT> 
<DD> LUT to translate 16-level gray-scale pixel
into the index of x's default color map  <TT>x:*colormap*</TT>.
</DD>
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<B>*x-color-lut*</B> [variable]

<DL COMPACT>
<DT> 
<DD> LUT for several vivid colors defined in 
<TT>x:*color-map*</TT>.
Registered colors are "black", "red", "green"