# Sandbox.UI.BaseTreeView.ExpandOnClick

```csharp
bool ExpandOnClick { get; set; }
```

A plain click opens a closed branch before selecting it. Open branches stay open.
Ctrl/shift selection and clicks on embedded controls retain their usual behavior.

Declared in [Sandbox.UI.BaseTreeView](/api/Sandbox.UI.BaseTreeView).
Assembly: `Sandbox.Engine`.