# ExpandItem(int, bool, bool)

> Expands the item with the specified ID, making its children visible. Allows to expand the whole hierarchy under that item.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.UIElements](/engine/6000.0/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public void ExpandItem(int id, bool expandAllChildren, bool refresh = true)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The item ID.**** (\[bool]\(https\://learn.microsoft.com/dotnet/api/system.boolean)): Whether the whole hierarchy under that item will be expanded.**** (\[bool]\(https\://learn.microsoft.com/dotnet/api/system.boolean)): Whether to refresh items or not. Set to false when doing multiple operations on the tree, to only do one RefreshItems once all operations are done. This is true by default.