You can filter the tree by typing the prefix to match. For example, in the screenshot above, all the getters were found by typing get in the text field at the top of the display. The Case Sensitive checkbox controls if the prefix matching is case sensitive or not. When you click on a node, the Java editor opens with the cursor on the selected item.
It's a pretty cool module—and at the bottom of the display you see a small legend with a tooltip to indicate what each icon means. So, in one glance you can see what's going on in your file. Pretty nifty, I think. Sandip and I are planning to write an article on this module soon.