Layers 50, 57, 58 missing in Eagle Pro?

Hello My Eagle Pro does not have layers 50, 57 or 58 which I need for 3D extrusion of components to give a 3D appearance. How do I get these layers in there?..if I click for a new layer, the numbers are from 100 upwards.

I am using Eagle Pro 6.5.0

Add them manually through the Eagle built-in command line:

layer 50 Outline;
layer 57 tCad;
layer 58 bCad;

They should then show up.