If you don't care to see the menu all the time, check this checkbox to make it be invisible by default. To toggle visibility of the menu, just click the Ctrl key in the browser.
Web Essentials ships with a range of Browser Link features that are all available from a menu that is injected onto your website when Browser Link is running.
When the mouse hovers DOM elements on the page in any browser, Visual Studio will open the source file and mark the exact location that generated the specific DOM element.
Works like Inspect Mode but when you finally click a DOM element in the browser, that element becomes editable. Any edits are transferred into Visual Studio in real time to update the source file.
Web Essentials uses some of the rules from webdevchecklist.com to scan for best practices. If any violations are found, a message in the Error List shows up.
When making edits in the various browser's developer tools, you can click Save F12 changes to automatically transfer the changes back to their source files in Visual Studio. This works with CSS changes only.
Instead of manually clicking Save F12 changes, you can stream the changes back to Visual Studio in real time.
Clicking this button will start recording the different CSS rules used on your site. Simply start navigating around you website, and when you're done, click the button again. This will produce a list of unused CSS in the Error List inside Visual Studio.