title: Adding legend to plot in ImageJ
body: <p>I'm a bit stuck in a small problem with <a href="http://rsb.info.nih.gov/ij/developer/api/ij/gui/Plot.html" rel="nofollow">ImageJ plots</a>.
  I need to add a simple legend. I have two lines (one is red and the other one is blue) and I want to add a sidenote that explains that line red is function "a" and line blue is function "b", but i can't understand how to use addLegend method in Plot class. Can you help me? An example would be very useful.</p>