The Paste command copies the selected object from the clipboard into the current scene.
Elements are placed on the clipboard using the Cut or Copy features of Amapi 3D.
Amapi 3D pastes an object at the location (relative to the origin of the work space) it had when it was cut or copied, even if you have switched current document (see how to toggle from one document to another in the chapter User Manual/Window/Document). If you paste an element in the same document you copied/cut it from, the copy will be placed at the exact same location as the original object, and will therefore be on top of it.
Pasting an element does not change the contents of the clipboard.