The LastSelected property of the Editor.SceneViewportWidget class provides a reference to the most recently selected SceneViewportWidget instance. This static property is useful for accessing the last active viewport widget in the editor, allowing developers to perform operations or retrieve information from the last selected viewport without needing to manually track it.

To access the last selected SceneViewportWidget, simply use the LastSelected property. This can be particularly useful in scenarios where you need to apply changes or retrieve data from the viewport that was most recently interacted with by the user.