How to remove background right-angle slices from restored Scene Views of models from SPL Brain Atlas

Note: my usage of Slicer is non-typical, just toward trying to learn brain anatomy.

Operating system: Windows 8.1 win-amd64 Intel Core i7
Slicer version: 4.8.0 r26489
Expected behavior: restored SPL scene view minus background slices
Actual behavior: 3-D models show with background right-angle slices

When I ‘restore’ a Scene View from the SPL Brain Atlas, it presents the selected set of structures with a background of 2 right-angle slices, which can get in the way of viewing the 3-D structures from different angles, and also seem to slow down the user rotation of the model.

How can I remove those 2 right-angle slice backgrounds from the view, without removing them from the scene that SPL included in their atlas, and then save that modified view for later viewing?