The consequent elevation copy differs from a simple copy by that after implementation of a copying the current elevation value is not reset, so it is not necessary to select the object - etalon anew, and you must continue copying this (or again changed) height into the next object.
The consequent elevation copy differs from a simple copy by that after implementation of a copying the current elevation value is not reset, so it is not necessary to select the object - etalon anew, and you must continue copying this (or again changed) height into the next object.