It seems that also the viewer in BIM 360 Docs has been updated with more configuration options. We now have the same options as we have in BIM 360 Team.
To access the new viewer options, select a 3D file (like a Revit project) and select the settings button:
Next you will see all the options.
In the next image you can see the difference between the previous of BIM 360 Docs versions and the actual one.
Interesting options like background image, lighting, ghost hidden objects, visual optimization can all be controlled now.