Let's start from the beginning, and open this View:
At the bottom of the Eclipse window you should see something like this:
Let's populate it with some data now ;) - this is the hardest part, because your project should have a Spring Project Nature, my own didn't have it, therefore I had to correct its configuration - adding missing Nature first:
and defining which files contain Spring Beans:
Finally we can find the file defining our application's request handlers, and populate the View with defined mappings:
Which will look somehow like this now:
When you click twice on any of the lines in this view you'll be transfered to the appropriate handler method, like in this example:
I'm still learning this View, and hope that next STS versions (I'm using 2.5.2 currently) will bring more functionality in it.