Highlighting mode is determined by the component.

Series will brighten when hovered.

Series will brighten when hovered, and, if applicable brighten indiviudal shapes or markers.

Series will fade if they aren't the hovered series, and, if applicable other shapes in the hovered series will fade.

Series will fade if they aren't the hovered series, and, if applicable other shapes in the hovered series will fade.

No highlighting is defined at the chart level. Individual series may have local highlight settings.