title: What key shortcuts are to comment and uncomment code?
body: <p>There were <kbd>Ctrl</kbd>+<kbd>E</kbd>+<kbd>C</kbd> (comment) and <kbd>Ctrl</kbd>+<kbd>E</kbd>+<kbd>U</kbd> (uncomment) in older versions, or <kbd>Ctrl</kbd>+<kbd>K</kbd>+<kbd>C</kbd>  and <kbd>Ctrl</kbd>+<kbd>K</kbd>+<kbd>U</kbd>.</p>
  
  <p>But in VS 2012, I can't see key shortcuts:</p>
  
  <p><img src="https://i.stack.imgur.com/0E9m8.png" alt="enter image description here"></p>
  
  <p>How to enable those shortcuts?</p>