# SelectionType

> Controls how many items can be selected at once.

## Definition

* **Type:** Enum
* **Namespace:** [UnityEngine.UIElements](/engine/6000.7/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public enum SelectionType
```

## Remarks

Used by [BaseVerticalCollectionView](/engine/6000.7/script-reference/unityengine/uielements/baseverticalcollectionview.md) and its inheritors including [ListView](/engine/6000.7/script-reference/unityengine/uielements/listview.md), [TreeView](/engine/6000.7/script-reference/unityengine/uielements/treeview.md), [MultiColumnListView](/engine/6000.7/script-reference/unityengine/uielements/multicolumnlistview.md) and [MultiColumnTreeView](/engine/6000.7/script-reference/unityengine/uielements/multicolumntreeview.md). Set the view's `selectionType` property as one of these values to control how many items can be selected at once.

## Fields

| Value                                                                                        | Description                            |
| -------------------------------------------------------------------------------------------- | -------------------------------------- |
| [Multiple](/engine/6000.7/script-reference/unityengine/uielements/selectiontype/multiple.md) | Multiple items are selectable at once. |
| [None](/engine/6000.7/script-reference/unityengine/uielements/selectiontype/none.md)         | Selections are disabled.               |
| [Single](/engine/6000.7/script-reference/unityengine/uielements/selectiontype/single.md)     | Only one item is selectable.           |