Do not rush to scold me, saying: what the hell, change is still not saved. I'm not about that.
Faced with this problem - customers put projects on editing existing site with the host. Work easy, for 40 minutes, I want to figure out how it will look. Well, I went to the site and using the console edit only the styles of existing elements. A couple of lines in html to add. Maybe there are some plugins browserskin the extension or app?
Tell me who knows.