title: Project in Eclipse that builds a jar used by another project in Eclipse
body: <p>I have several projects open in Eclipse.  One of them is the main app, and others build jars used by that main app.  How do I make it so that when I hit F3 on a method call in the main app that it takes me to the source in the other project instead of taking me to the class file in the Libraries list?  I got it so that it shows me the source, but I can't actually edit it like it could if I go to the other project, and similarly when I step through in the debugger it doesn't go into the editable code.</p>
  
  <p>I don't know if it's relevant, but we're using Maven to handle the dependencies.</p>
  
  <p>I know this should be simple, but I haven't found the option.</p>