Easily duplicate DOM nodes

These are essentially cut/copy and paste operations.

You can easily change the DOM without having to edit the HTML as a giant string.

1. Right click on a node and select Copy.
2. You can paste in your code editor, or for prototyping, you can paste the DOM node elsewhere in the DOM tree. The pasted node is inserted as a child of the currently selected node. In the video, I use the left arrow key to jump to the immediate parent opening tag and paste there (which is what I do in most cases).

You can also Cut (right click > Cut, Cmd + x/Ctrl + x) a DOM node and paste - which has the effect of moving the node.

Experiment: Try adding more links in the header/footer of a site using this copy and paste technique and figure out at which point the layout needs improving.