When models with layer information are loaded into the 3D Viewer, you can manage the geometry visibility through the Layers panel on the left side of the 3D Viewer screen. The panel becomes accessible as soon as a 3D model with at least one layer is loaded.

In the Layers panel, you can search for specific layers, sort the layers by their name or model, and filter the list to narrow the layers you need. Additionally you can hide and unhide the layers. You can also isolate the layers by choosing the required layers, selecting the ellipses icon, and then choosing the Isolate layers option, or by using the Change visibility option of the bottom toolbar.

It is important to note that the object visibility controls of a model do not change the visibility of the layers within the Layers panel. For example, if you hide layers in the Layers panel, the Show all objects icon in the toolbar will not make the hidden layers visible again.