How to Add HTML5 Intellisense Support to Visual Studio 2010 SP1?

Question

How to Add HTML5 Intellisense Support to Visual Studio 2010 Professional Edition SP1?

I've installed this: http://visualstudiogallery.msdn.microsoft.com/d771cbc8-d60a-40b0-a1d8-f19fc393127d but nothing happened.

For example when I type <convas on the Visual studio source view of a page, I expect the list of its attributes to be listed, etc.

Answer 1

When you are in an html editor, there is a box at the top of the page to select the validation, it defaults to XHTML (I think), and you can change it to HTML5.