The animation above shows the basic steps to show and hide objects.
1. Open the panel «Hidden objects»
2. Click an object to hide it
When an ojbect is hidden it is displayed in the list of hidden objects.
3. Hover a list element to preview the what object is hidden in the scene
If you don't see a hightlighted object in the scene, the object is probably located outside of the view.
4. Show the object again by clicking on “X” or dragging the list element back into the scene