title: Eclipse f3 not opening declaration
body: <p>I have Eclipse (Mars) web development tools installed on a MacBook Air.  Recently, hitting f3 stopped opening the declaration.  </p>
  
  <p>The key mapping in Eclipse (Mars) - web development tools:</p>
  
  <p><a href="https://i.stack.imgur.com/rQoUZ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/rQoUZ.png" alt="enter image description here"></a></p>
  
  <p>In another Eclipse install (Luna) - Android development tools, where the f3 function is working, the key mapping is:</p>
  
  <p><a href="https://i.stack.imgur.com/gPzkq.png" rel="noreferrer"><img src="https://i.stack.imgur.com/gPzkq.png" alt="enter image description here"></a></p>
  
  <p>What is wrong with the Mars version?  What do I need to add to get it to work in the Java editor?</p>
  
  <p>I have seen <a href="https://stackoverflow.com/questions/12212686/eclipse-shorcuts-f3-ctrlclick-not-working-for-navigation">this post</a>, but I don't have the exact same issue.  Nothing happens when I hit f3.   </p>
  
  <p><strong>Additionally</strong></p>
  
  <blockquote>
    <p>Other short cut keys work.</p>
    
    <p>Opening the declaration with the context menu does work.</p>
  </blockquote>
  
  <p>But there is no key short cut listed in the context menu.  </p>
  
  <p><a href="https://i.stack.imgur.com/OgvBN.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OgvBN.png" alt="enter image description here"></a></p>
  
  <p>Did this key mapping change with Mars?  In my Luna verion, the context menu has the key map listed:</p>
  
  <p><a href="https://i.stack.imgur.com/HGzXb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/HGzXb.png" alt="enter image description here"></a></p>