# Editor.AdvancedDropdownWidget.OnSelect

```csharp
System.Action<object> OnSelect { get; set; }
```

Called when a leaf item is selected. Receives the item's [Editor.AdvancedDropdownItem.Value](/api/Editor.AdvancedDropdownItem/Value).

Declared in [Editor.AdvancedDropdownWidget](/api/Editor.AdvancedDropdownWidget).
Assembly: `Sandbox.Tools`.