The same chart data could now be compared through additional familiar visual styles. Theme snapshots and a shared registry connected the available themes to the generated gallery.
Callout controls and smoother playback transitions made animated explanations easier to follow. The work also corrected horizontal legend measurement, which affects how labels and entries fit together.
For your own page, choose a theme in the gallery and carry its theme identifier into the HTML example. The theme changes presentation; it does not replace your source data.