Isolating & Unisolating Layers
Isolate Layers from the Layers Panel
You can isolate a single layer or multiple layers in the Layers Panel by
Searching for layers and using the Change visibility function
Clicking the overflow menu button for a layer and select Isolate layer
Multi-selecting layers and opening the context menu and selecting Isolate layer
Isolate Layers from the 3D View
Select a CAD entity or a BIM element and isolate the Layer it is assigned to. This also works with multiple selected entities or elements - the combination of Layers will in this case be isolated in the viewer.