Graph designs are named art a graph draws in place of its default
marks. Marker designs follow
https://helpx.adobe.com/illustrator/desktop/automate-visualize-data/visualize-data/apply-marker-designs-to-graphs.html
and the Graph Design dialog
https://helpx.adobe.com/illustrator/desktop/automate-visualize-data/visualize-data/reuse-graph-designs.html
- graph.design saves the selected art as a named design (Save Design),
pastes a copy of a design into the document, selected, to edit and
save again (Paste Design), and deletes one; graphs drawing a deleted
design go back to their default marks.
- graph.marker draws the data points and legend swatches of the series
picked with Group Selection (or listed, or every series) with a
design: its backmost object is scaled to fill the default marker's
square, strokes, effects and pattern tiles scaling with it. Line,
scatter and radar series; null goes back to the default square.
- Object › Graph › Design… and Marker… open dialogs listing the
document's designs.
Own choices, as the pages don't say: the backmost object's bounds, not
only a rectangle's, set the size (a single object uses its own bounds);
Delete Design manages the list; a design keeps its own paint, so
painting a series doesn't recolour it.
Designs are stored in a new `graphDesigns` list and series designs in
`seriesMarkers`, written only when present. A graph saved as a design is
kept as the plain art it draws. A design holds at most 2,000 objects, a
document 1,000 designs, and a graph whose designs would draw more than
200,000 objects draws default squares; a file's designs are tidied the
same way on open. Global swatch edits, image relinking and placed
documents see design art like symbol art. Graphs without marker designs
draw the same art as before.