Not sure how I got into this mode but I can't get it out of it. As you can see it's using a lot of valuable screen space
Drag the PCB layers tool bottom right corner
@UserSupport
Ah thanks. My eyesight isn't all it could be and I didn't notice the arrow there.
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Brand new interactions and interfaces.
Smooth support for design sizes of over 3W
devices or 10W pads.
More rigorous design constraints, more
standardized processes
For enterprises, more professional users.
Easy to use and quick to get started.
The process supports design scales of 300
devices or 1000 pads.
Supports simple circuit simulation.
For students, teachers, creators.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Drag the PCB layers tool bottom right corner