title: Watching variables in Xcode
body: <p>I'm trying to watch a variable with Xcode. I'm following the instructions in <a href="http://developer.apple.com/documentation/DeveloperTools/Conceptual/XcodeDebugging/500-Managing_Program_Execution/program_execution.html#//apple_ref/doc/uid/TP40007057-CH8-SW8" rel="nofollow noreferrer">here</a> by pausing at a breakpoint, selecting Run > Variables View > .... but with the exception of "Enable Data Formatters" the rest of the options are all greyed out. Any ideas?</p>
  
  <p>I'm using Xcode version 3.1.3.</p>