You don't because the concept itself is flawed -- since starting out with what it looks like instead of what things ARE pisses on the entire reason HTML even exists, concepts like semantics and separation of presentation from content, resulting in websites that are nothing more than a giant middle finger to users.
That's why not one single WYSIWYG in the history of web development has created a website that was worth a flying ****! They are the pinnacle of developer ignorance and incompetence, and at BEST are little more than nube predating scam-bait!
You take content of value or a reasonable facsimile of future content, mark it up SEMANTICALLY (a sick euphemism for "use HTML correctly") with ZERO concern for what it looks like, then bend that markup to your will with CSS using semantically neutral containers like DIV and SPAN where and only as needed.
THAT is design. Dicking around with what it looks like from the start is called graphic arts.