Yikes! Where are you guys? Sorry to disappear but we're just a small group of hobbyists who all seem to be off on other adventures at the moment. We hope to be back in the future but have no definite plans. In the meantime, we'll leave the RxR Gallery up and running as long as we can.

Can I hide the track or cover to get at the pieces underneath? Yes! When you are editing track layouts, you can use the Layer Toggle in the gizmo to hide the cover layer so you can get at the track, or hide both the cover and the track layers so you can fix up the houses, roads, and ground. One more tap restores all three layers so you can finish up pieces in any layer.
While you're running a train, of course, all layers are visible.