title: Active working sets in Eclipse
body: <p>I am familiar with Eclipse and with working sets. But there is something I don't understand: 
  Why are there new menu options (with some working set names) just under "Select Working Set...", "Deselect Working Set", "Edit Active Working Set.." options?</p>
  
  <p>Clicking on one of these working set names, a dot appears on the left and the project explorer view contains just this working set.</p>
  
  <p>It seems this is the active working set. Is that right?</p>
  
  <p>But, I don't understand how I can force a working set to be in the menu options so I can select it to be active. In my workspace, I have 10 working sets but just 2 of them are in the menu options, I don't know why.</p>