title: DrRacket keyboard shortcut for α-rename
body: <p>How can I bind a keyboard shortcut (e.g. F2) to <a href="http://docs.racket-lang.org/drracket/buttons.html?q=rename#%28idx._%28gentag._12._%28lib._scribblings%2Fdrracket%2Fdrracket..scrbl%29%29%29" rel="nofollow">α-rename</a> in DrRacket, available as <code>rename foobar</code> in the context menu brought up by right-clicking on a variable name?</p>
  
  <p>The <a href="http://docs.racket-lang.org/drracket/Keyboard_Shortcuts.html?q=keyboard#%28part._defining-shortcuts%29" rel="nofollow">documentation</a> boils down to "call a magic function name from the <a href="http://docs.racket-lang.org/tools/implementing-tools.html" rel="nofollow">API</a>", but I'm having a hard time finding that operation in said API.</p>