What Brian said. If you've not read the this forum post yet, I recommend you do. There is a link in there that explains how to create a character sheet and I found it very helpful. In fact, the only thing I can see a WYSIWYG editor helping with is the sizing of the various <div>s. Realize that your overall page size is around 840px, so you'll want your subcontainers to fit within that...unless you want to resize the window each time, and even then I find things get kind of funky. I found the easiest approach was using the predefined classes for <div>s that Roll20 provides. The approach I found the easiest to work with was a sheet-row class with sub-<div>s of sheet-col. I found using the 3col or 2col <divs> to be more of a hassle, because they have preset sizes that don't always work well for what I wanted to do. Going the -row with -cols route allowed me to set the size of each column and alter the number of columns needed. This allowed me to set up a header row of sorts without having to use a <table>. That was especially useful when working with the the repeating fields functionality. But, as always, YMMV.
