Import the preset and register. This will register all the chart plugins under nvd3.
```js
import { NVD3ChartPreset } from '@superset-ui/legacy-preset-chart-nvd3';
new NVD3ChartPreset().register();
```
or register charts one by one. Configure `key`, which can be any `string`, and register the plugin. This `key` will be used to lookup this chart throughout the app.
```js
import { AreaChartPlugin, LineChartPlugin } from '@superset-ui/legacy-preset-chart-nvd3';