When editing the site in the Editor there are some strange visual bugs happening on the page, the most obvious is that it adds spacing at the top of the page, and in case of the fullscreen image it is even worse.

See example here https://drive.google.com/open?id=0B_S4E859g0NoM3huY3RUWmFGVGM

Some clients think that they have mistakenly pressed something wrong and panicking. 

Thanks!