# Selection

The HeatMap allows you to visually select its cells by rendering a border around the cell when the selection functionality is enabled.

By default, cell selection is disabled. To enable it, set the `SelectionMode`, `SelectedCellBorderColor` and `SelectedCellBorderThickness` properties of the HeatMap.

> In order for the selection cell border to appear, you need to set all three properties.

The `SelectionMode` property is an enumeration of type `HeatMapSelectionMode` which provides the following values:

* (Default) `None`—The selection is disabled.
* `SingleDataItem`—Only a single data item can be selected with interaction.
* `MultipleDataItems`—Multiple data items can be selected with interaction.

The `SelectedCellBorderColor` property is of type `Color` that gets or sets the color of the selection border.

The `SelectedCellBorderThickness` property is of type `Thickness` that gets or sets the thickness of the selection border.

#### **Enabling the selection behavior of the RadHeatMap**

```XAML
<telerik:RadHeatMap SelectionMode="MultipleDataItems" SelectedCellBorderColor="Red" SelectedCellBorderThickness="2" />
```

**A HeatMap with its cell selection enabled**

![WinUI RadHeatMap RadHeatMap with selection enabled](https://www.telerik.com/winui/documentation/assets/f1915297cbd4ac546c26d054318d63e4/radheatmap-selection_0.png)

## See Also

* [Getting Started with the Telerik UI for WinUI HeatMap](https://www.telerik.com/winui/documentation/controls/radbadge/getting-started)
* [Telerik UI for WinUI Demos](https://demos.telerik.com/winui/)