A PlotStyleTable model in doc with our own built-in tables (default.ctb keeps
object properties, monochrome.ctb prints black, grayscale.ctb prints the grey of
each colour's luminance). The render builder resolves each object's style by its
index colour (true colours by the nearest index) and applies colour, screening,
linetype and lineweight. PLOT/EXPORTPDF use the page setup's table (or the
plotStyleTable option); layouts with Display plot styles (PAGESETUP
displayPlotStyles, DXF plot flag 2) show it on screen and in PNG/SVG exports.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
