In this article I use the Line tool (A), the Push/Pull tool (B), the Select tool (C), the Make Component tool (D) and the Move tool (E). After you’ve created and duplicated your component, you’ll still be able to modify it. And when a component is changed, all duplicated components will change as well. Select the component (a blue box will appear around it), right-click and select Edit Component. If you want a component to differ from its duplicates, right-click and select Make Unique.