# selectAllOnMouseUp

> Controls whether the element's content is selected when you mouse up for the first time.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.UIElements](/engine/6000.3/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public bool selectAllOnMouseUp { get; set; }
```