[PaulHoule]

Markdown sux and so do visual editors. I think visual editors were just invented to make it so cut-and-paste never quite works right. There's been some conceptual problem with the whole idea ever since MS Word and the industry has never dealt with it.

[hdjrudni]

I think it could conceivably work. I vaguely remember WinForms being decent. You have to restrict what the user can do a bit. Have things snap into allowed positions.