This style inspector setting lets you show and hide elements. You can switch between visible, hidden and collapsed.
Just makes the element invisible, but the element still affects the layout.
Shows the element.
Removes the elements completely, the layout is not affected.
In addition, the opacity of the element can be changed. All nested elements are also affected by the opacity setting.
You can specify the painting order within a container. Elements with a higher z-index are behind later and show up above other elements with a lower z-index.
Paint above all
Independent of the hierarchy and layout, paint above all paints the object above all other elements. This is especially useful for pop-up menus.