title: How to open a second package-explorer window in Eclipse?
body: <p>I use Eclipse Neon.3 and work with Working Sets in hierarchial package presentation setting. I use the Java perspective.</p>
  
  <p>And I have two working sets (working-set-new and working-set-old) for two different projects (project-old and project-new).</p>
  
  <p>For a better refactoring of the old project to the new project I want to show both projects in the package exporer. So I want to open the package explorer a second time and put it next to the other package explorer. This might help me a lot to check which classes from the old project I have already moved to the new project (without scolling).</p>
  
  <p>My question is: Can I open a second package explorer? And when yes how?</p>
  
  <p>Or can I do it another way?</p>