I may be misinterpreting the question, but there are two main ways an object can be copied.
Select an object instance in the layout, type Ctrl + C to copy the instance, and then Ctrl + V and click to paste the instance.
This results in a new instance, which will be affected by the same events that affected the old instance.
Right-click an object instance in the layout, from the context menu that pops up, choose "Clone object type", and click to place the first instance of the new object.
This results in an instance of a new object, which will not be affected by the events that affected the old instance you initially right-clicked.