To select objects in a layer
In the Explorer panel, open the Layers view (Hotkey: L).
Right-click a layer name and select Select Objects in Layer.
The objects are selected in the Layers view and the Level Viewport.
Tip: Double-click a layer in the Explorer to focus and frame the objects in the Viewport.
To hide or freeze objects in a layer
In the Layers view, select a layer and do the following:
When a layer is hidden, its objects are invisible in the Level Viewport.
Freezing a layer locks its objects, so they cannot be modified.