This is one feature that was lost when the Flash version of the tree was closed. Each person in the tree could be viewed as a vertical or horizontal rectangle. The default (and only) option now is the horizontal one, but the vertical layout was more compact and saved a lot of lateral space, making the visualization of extended family branches much easier.
I don't know if it's already a planned feature that has not been implemented yet in the HTML5 tree, but I'd like very much to be able to use it again.
