I tried to post a comment to this effect on stack exchange, but it wouldn't let me post images. XCode does this in a single column using varying shades of grey

I tried to post a comment to this effect on stack exchange, but it wouldn't let me post images. XCode does this in a single column using varying shades of grey: http://i.stack.imgur.com/frCcI.png The grey rectangles may also be clicked on to fold text. On hover you see: http://i.stack.imgur.com/EzjXW.png And after folding you see: http://i.stack.imgur.com/wsNRR.png