Unity Use Layers popup to lock objects and control visibility
By placing your objects on different layers you can control if these objects should be locked on your scene or not. It may be a good idea to lock layers that you don’t want to move by accident (like ground game object). In order to lock a layer, use the Layers popup that is located in the top-right corner of your Unity editor.
Instead of just locking layers of objects that you don’t want to edit, you may want to turn off the layer visibility in your Scene window. It’s especially useful when your scene contains a lot of objects that you don’t need to see at all times.
Please be aware that you can create only 24 layers per project. It should be more than enough for any game, but don’t get too happy with creating new ones!
Unity Use Layers popup to lock objects and control visibility
