Chrome DevTools: A new experimental editor for layout editing

There's a hidden experiment in Canary DevTools called the Layout Editor. While things are likely to change, here's some information on what it does:

• If you inspect an element, markers appear at the boundaries of it within the webpage.
• If you drag the markers, they affect the margin or padding of the element.
• The markers specify the current margin/padding value as you change it.

Warning: This is an experimental feature currently in Canary! Things are likely to change. Some experimental features are removed.