> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/llms.txt)
# Style symbols based on pitch
This example uses the [`['pitch']`](https://docs.mapbox.com/style-spec/reference/expressions/#pitch) expression to add in leader lines to labels after a certain pitch threshold is crossed. This is achieved by adding two different layers and setting complementary pitch based filter conditions on them.
> Example code:
**JavaScript**
```html
Style symbols based on pitch
```
**React**
```jsx
import React, { useEffect, useRef } from 'react';
import * as mapboxgl from 'mapbox-gl/esm';
import 'mapbox-gl/dist/mapbox-gl.css';
const MapboxExample = () => {
const mapContainerRef = useRef();
const mapRef = useRef();
useEffect(() => {
mapRef.current = new mapboxgl.Map({
// TO MAKE THE MAP APPEAR YOU MUST
// ADD YOUR ACCESS TOKEN FROM
// https://account.mapbox.com
accessToken: 'YOUR_MAPBOX_ACCESS_TOKEN',
container: mapContainerRef.current,
zoom: 13.5,
pitch: 85,
bearing: 70,
center: [-119.53543366513888, 37.74467518164313],
style: 'mapbox://styles/mapbox-map-design/claitl3i0002715qm9990tl95'
});
mapRef.current.on('load', () => {
const layer = mapRef.current
.getStyle()
.layers.find((layer) => layer.id === 'natural-point-label');
const lowPitchFilter = ['all', layer.filter, ['<', ['pitch'], 60]];
mapRef.current.setFilter('natural-point-label', lowPitchFilter);
layer.id = 'natural-point-label-elevated';
layer.layout['icon-image'] = 'leader_line';
layer.layout['icon-anchor'] = 'bottom';
layer.layout['text-offset'] = [0, -12.5];
const highPitchFilter = ['all', layer.filter, ['>=', ['pitch'], 60]];
layer.filter = highPitchFilter;
mapRef.current.addLayer(layer, 'natural-point-label');
});
}, []);
return ;
};
export default MapboxExample;
```