Graph Type: Add Drop Shadow and Add Legend Across Top

Graph Type's Add Drop Shadow, as
https://helpx.adobe.com/illustrator/desktop/automate-visualize-data/visualize-data/add-drop-shadows.html
describes, and Add Legend Across Top, as
https://helpx.adobe.com/illustrator/desktop/automate-visualize-data/visualize-data/change-the-position-of-legends.html
describes.

- dropShadow: a shadow behind each column, bar, stacked segment, line
  (line, scatter and radar) and pie wedge, just behind the series of
  its layer, so areas and columns drawn in front don't hide the shadows
  of the layer behind them.
- legendAcrossTop: the legend's swatches and labels left to right from
  the plot's left edge, wrapping at the plot's width, the last row just
  above the plot and anything drawn over it (radar and stacked-pie
  labels).

Own choices, as the pages don't say: a shadow is a black copy 2 pt down
and right at 35% opacity; markers, areas and legend swatches cast none,
nor do stacked segments of 0; a graph with more than 200,000 shadowed
marks draws none.

New fields are written only when set. Graphs with default options draw
the same art as before.

docs/roadmap.md

@@ -59,7 +59,7 @@ Checked 2026-10-10 from the code, tests and open issues; no workflow fails, so V
 | M9 | Live effects (+ 3D & Materials) | 🟡 2D effects done incl. Effect → Pathfinder, Color Adjustments and Document Raster Effects Settings; PDF export warns when the pixel cap lowers raster-effect resolution; initial Revolve only; SVG Filters, remaining raster effects and 3D pending | 81–130 |
 | M10 | Brushes, symbols, patterns, Repeat | 🟡 pattern swatches (5 tile types, Pattern Options, editing mode, SVG `<pattern>`/PDF export) and live Repeat (radial/grid/mirror) done; brushes/symbols in progress | 23–37 |
 | M11 | Artboards & views (artboard panel/tool with Move Artwork for X/Y fields and Artboard Options, Trim View, middle-button pan, print tiling and the status bar's artboard navigator done; multiple windows, presentation polish) | 🟡 | 15–25 |
-| M12 | Advanced color & art (CMYK/ICC, separations, Gradient Mesh, Live Paint, Image Trace, Graphs) | 🟡 Gradient Mesh, Live Paint, Image Trace (13 presets, 18 ms/1k² image; the Flat Logo mode places edges to a fraction of a pixel, restores sharp corners, snaps lines and circles, and refuses gradients), Recolor Artwork, colour management (ICC, soft proofing, separations preview), Graphs (all 9 tools, Graph Data/Type, group-selected series colours persist through regenerate/save/open) done; Graph Design and Marker designs, Transpose and Switch x/y, `|` label line breaks and the pie options done; graph Column designs, Import Data and the data sheet's cell style pending | 6–10 |
+| M12 | Advanced color & art (CMYK/ICC, separations, Gradient Mesh, Live Paint, Image Trace, Graphs) | 🟡 Gradient Mesh, Live Paint, Image Trace (13 presets, 18 ms/1k² image; the Flat Logo mode places edges to a fraction of a pixel, restores sharp corners, snaps lines and circles, and refuses gradients), Recolor Artwork, colour management (ICC, soft proofing, separations preview), Graphs (all 9 tools, Graph Data/Type, group-selected series colours persist through regenerate/save/open) done; Graph Design and Marker designs, Transpose and Switch x/y, `|` label line breaks, the pie options, drop shadows and the legend across the top done; graph Column designs, Import Data and the data sheet's cell style pending | 6–10 |
 | M13 | Automation (Actions ✅ record/playback, persisted; variables, scripting, batch) | 🟡 | 18–27 |
 | M14 | 1.0 polish (preferences, shortcut editor, workspaces, accessibility, packaging for all OSes) | 🟡 Preferences, shortcut editor (chords with Shift and a punctuation key fire as typed), workspaces, a custom title bar on Windows/Linux with a Home button, content-sized dialogs, menus that scroll when longer than the window and macOS native menu dismissal done (M14.8), and native macOS save sheets with a Format menu (#866); an experimental, unsupported Windows 7 x64 portable OpenGL build (not verified by maintainers); accessibility and broader Windows/Linux packaging/QA pending | 18–28 |
 | — | Interaction fidelity pass (every tool's modifiers, Properties panel per context, isolation, nuance) | ⬜ | 60–90 |
@@ -79,6 +79,7 @@ After placed documents (File › Place of a `.vectorcraft` file, linked), M4.14
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-11 | minor | M12: Graph Type's Add Drop Shadow and Add Legend Across Top. Scores/hours unchanged. |
 | 2026-10-11 | minor | M12: Graph Data's Transpose and Switch x/y, `|` line breaks in graph labels, pie Legend/Position/Sort. Scores/hours unchanged. |
 | 2026-10-11 | minor | M12: Object › Graph › Design… and Marker… (graph designs, marker designs); column designs remain. Scores/hours unchanged. |
 | 2026-10-12 | minor | M14: native macOS save Format menu (#866); filename regression tests, actual SVG save and PDF selection/cancel verified; estimates unchanged |