Are you looking to set up a (like CMOS or MEMS) for your 2.5D visualization?
A dedicated list on the right allows you to toggle specific material groups on or off, which is useful for "peeling back" upper metal layers to see lower-level transistor structures. klayout 25d view
The 3D view is completely black. Solution: You are likely looking from inside the substrate. Reset the camera ( View > Reset 3D Camera ). Also, ensure your "Background color" in preferences is not black (set it to dark grey). Are you looking to set up a (like CMOS or MEMS) for your 2