Un objecte que sigui a sobre cobrirà, parcialment o totalment depenent de la seva mida, tots els altres objectes al seu voltant. Mentre que un objecte al fons de la diapositiva no serà visible, si està cobert per altres objectes. Un objecte al mig pot ser parcialment cobert per altres objectes i cobrir- ne d' altres.
An object that is on top will cover, either partially or fully depending on its size, all other objects beneath it. Meanwhile an object on the bottom of the stack may not be visible at all, as it is covered up by other objects. An object in the middle may be partially covered by other objects, while partially covering yet more objects itself.