Magic Edit: How to Use the Magic Edit Button
Simple. As soon as the Magic Edit Button determines you're on a page from a supported platform, simply click the extension button or the Magic Edit Button on the page. The on page button you can also right click for more resources and information as well.
If you want to know if the button is active and don't see it, look up at the extension icon in the Chrome toolbar. The wizard hat and wand will show letters on it denoting the platform it believes it's found. If there are no letters, then it believes it's not on a supported platform. If it's wrong, send us the url and platform so we can fix it.