The small triangle at the top of the library list will let you select the objects or figures libraries. The roads are in objects and the figures, well, they are just that. make footprint shapes with rectangles and circles. ie., you have an MTH warehouse and know that it's 6.5" by 8.5", or an oil tank that's 6" in diameter.
The returns on the inside rail limit all engines to be able to run on that radius. I don't think you reverse direction enough to make it operationally annoying. It makes it a little fun. Train has cross to inside, change direction and turn around and cross back to outside without colliding.
If you make balloons on the out side loop it will cramp the inside loop. Turn it more into a dogbone.
Whatever you like.
