Duplicating Objects
There are many ways to Duplicate an Object
Custom Selection Command

This menu command will let you make complex selections based on very precise criteria
Edit Menu Selection Commands

There are four object selection commands that are part of the Edit Menu
Coincident Objects
When an object is Coincident with another object it means that some part of an Object is sharing the space that another Object currently occupies
Move Commands

There are two menu Commands that are designed to move a selection of objects by an amount that you specify
Edit 2D Component Command

This command will enable you to access and edit the 2D geometry that is already being used by a Plug-in object.