# RangeBarReferenceProperties

Canonical page: https://www.adaptabletools.com/docs/reference/rangebarreferenceproperties

Optional reference value drawn as a *second* marker on a Range Bar track,
together with its marker styling.

```ts title="TypeScript"
export interface RangeBarReferenceProperties 
```

## Properties

| Property | Type | Description | Default |
| --- | --- | --- | --- |
| [Marker](https://www.adaptabletools.com/docs/reference/rangebarreferenceproperties.md#marker) | [`BarStyleMarker`](https://www.adaptabletools.com/docs/reference/barstylemarker.md) | Visual style of the reference marker. | `{ Shape: 'Line', Color: 'var(--ab-color-foreground)', Size: 2 }` |
| [Value](https://www.adaptabletools.com/docs/reference/rangebarreferenceproperties.md#value) | [`RangeBarBound`](https://www.adaptabletools.com/docs/reference/rangebarbound.md) | Resolvable reference value (number / column id / &#39;Col-Min&#39; \| &#39;Col-Max&#39;<br/>\| &#39;Col-Avg&#39; \| &#39;Col-Median&#39;`). Same forms as `RangeBarStyle.Min` / `Max. |   |

## Property Details

### Marker

Visual style of the reference marker.

```ts title="TypeScript"
Marker?: BarStyleMarker;
```

###### Default Value

`{ Shape: 'Line', Color: 'var(--ab-color-foreground)', Size: 2 }`

###### Property Value

[`BarStyleMarker`](https://www.adaptabletools.com/docs/reference/barstylemarker.md)

### Value

Resolvable reference value (number / column id / &#39;Col-Min&#39; | &#39;Col-Max&#39;
| &#39;Col-Avg&#39; | &#39;Col-Median&#39;`). Same forms as `RangeBarStyle.Min` / `Max.

```ts title="TypeScript"
Value: RangeBarBound;
```

###### Property Value

[`RangeBarBound`](https://www.adaptabletools.com/docs/reference/rangebarbound.md)