Charts Highlighting

Highlighting gives immediate visual feedback — crosshairs along axes, emphasis on the hovered series or point, and optional fading of everything else.

Axis highlighting draws a crosshair or category band where the pointer lands. Series highlighting dims everything except the hovered point or series — configure both per series, or drive selection from outside to link charts together.

• Dense multi-series plots where hover must isolate one mark or category.
• Dashboards that sync highlight across multiple charts via controlled highlighted_item.
• Axis exploration with band crosshairs and axis-triggered tooltips.

• Set highlight_scope with highlight and fade modes on the chart or per series.
• Enable axis_highlight for band or line crosshairs on cartesian charts.
• Pair with tooltip=TooltipConfig::axis() when the crosshair should list all series at x.