Nested figures


![](http://content.screencast.com/users/tmsp1/folders/Jing/media/81bd10cf-a119-491e-a981-ce3b5e1cff20/00000347.png)

i could use some feedback on the ux here, i think we should definitely do the thing where we only have a few canned image sizes, that will make this way less annoying to use.