Plot

Line charts drawn as light on glass, or as ink on a panel: gridlines faint, two traces at most, a red line for now.

Switch the stage to aluminium and graphite: the traces follow the ink on a panel, and glow on glass.

• Give the SVG role="img" and an aria-label that carries the values a sighted reader would take from it.
• The second trace differs by dash as well as tone.