title: How to show all parents and subclasses of a class in IntelliJ IDEA?
body: <p>When I'm editing a Java class in Eclipse, when my cursor is over a class variable, I can do <kbd>Ctrl</kbd>+<kbd>T</kbd> to have a popup that shows all its parents and subclasses. What is the equivalent in IntelliJ?</p>
  
  <p>Example:</p>
  
  <pre><code>Use|r user = new User();
  </code></pre>
  
  <p>The pipe is my cursor.</p>