title: Where is the expression window in Xcode 4?
body: <p>How can I add an expression to watch in Xcode 4? </p>
  
  <p>This should be very obvious, but it is not. It does not seem to be down any menu or available on a contextual click. It would be nice if I could highlight a variable or expression and then "Add to watch" or "Add expression".</p>