Tharakesh of HOPE Technologies Ltd. in Mumbai, India submitted the following tip.
When using the 3DORBIT command, the portion that you want to see may be hidden by another portion. In that case, before invoking the 3DORBIT command, select the object in which you are interested. Then 3DORBIT displays only the selected object. It’s cool! This also works for the 3DCORBIT command (3D Orbit with the Continuous orbit option).