Paintbrush Highlight

Select multiple points with the shift key.

View this example in the online editor

Vega-Lite JSON Specification

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "Select multiple points with the shift key.",
  "data": {"url": "data/cars.json"},
  "params": [{
    "name": "paintbrush",
    "select": {"type": "point", "on": "pointerover", "nearest": true}
  }],
  "mark": "point",
  "encoding": {
    "x": {"field": "Horsepower", "type": "quantitative"},
    "y": {"field": "Miles_per_Gallon", "type": "quantitative"},
    "size": {
      "condition": {"param": "paintbrush", "value": 300},
      "value": 50
    }
  }
}