Scroll synchronization doesn't take into account image height

[dandv]

On StackExchange, I'm often writing or editing answers that include a screenshot,
which make accessing the preview annoying - one has to scroll the page up and down constantly:

![Scrolling up and down constantly is annoying][1]

[1]: http://i.stack.imgur.com/VMZRL.png

But he'res a better way, which we see on Discourse.org:

![Discourse does it better][2]

  [2]: http://i.stack.imgur.com/7o9fs.gif

What if I type here?

Will it autoscroll?

Nope.