Layers and objects get a PlotStyle property (ByLayer/ByBlock/name) applied
through named tables (built-in default.stb and monochrome.stb, our own
definitions). DXF keeps the names in the ACAD_PLOTSTYLENAME dictionary of
ACDBPLACEHOLDER objects with group 390 on layers and objects; tables kept in
the drawing travel in a CADCRAFT_PLOTSTYLES XRECORD. PLOTSTYLE sets an object's
or the current (CPLOTSTYLE) style; STYLESMANAGER lists, creates, edits, deletes,
loads and saves tables in our own JSON format (docs/plot-styles.md). A Plot
Style Manager dialog edits a table's styles and the layout's table; the
Properties palette shows the current plot style and table.
Co-authored-by: Claude Opus 5.5 <[email protected]>
