The new "Character Back Color" menu item is what other editors call a highlighter. It is now possible to highlight text in any color you please. The cool thing about this feature is that I asked the developer about it only two weeks ago or so, and suddenly it's there. Nice. Of course, other (but not all) editors can do this too, but Jedit X has features I haven't found in others. Try it and see if it suits your working style. What I like about it is its bookmarks feature and the fact that its been rewritten in cocoa.