I don't think that is possible as the preview seems to be one-way only.
You can turn on "contenteditable" on the body tag in the preview, which makes it possible to change values. But the changes doesn't reflect back to the editor view.
RapidPHP Design View
Moderator: kfury77
Re: RapidPHP Design View
There are 10 types of people in the world: Those who understand binary and those who don't.