Depence comes with a hierarchical layer structure, which can have layers being children of other layers. Especially for bigger projects, layers are required to temporarily hide or lock parts of your scene. Once you add a new object to your scene it will be automatically linked to the currently active layer. Each layer has three parameters: Visible, Solo, and Locked. These will also be inherited from their parental layers.
To move an object to a different layer, select the object, right-click and choose "Move to Layer".
A second way is to right-click on the target layer and choose "Move selected", which will put all selected objects into this layer.
The layer color can be helpful to organize e.g. fixture or object types. The CAD view will also draw fixtures in layer color.