Преобразовывать текст в «предварительный просмотр» при вводе?

[Falco]

Summary outcome of the debate on wysiwyg?

There are zero plans for that in the forseeable future. If pure WYSIWYG is an absolute bedrock must-have requirement, the sooner you look elsewhere, the happier you will be.

We are pretty clear about WYSIWYG not being on the road map.