Scott, a discussion on the support repo about whether we should have H4 in the popup menu led me to consider an option I had been thinking about in the background — letting the user configure the contents of that menu. It's basically a list of names, chosen from these:

bold, italic, underline, anchor, h1, h2, h3, quote, unorderedlist, orderedlist, pre, removeFormat, justifyLeft, justifyCenter, justifyRight, justifyFull, indent, outdent

They all seem to work. Special provisions need to be made in the baseline site for h1, h2, and h3, esp h3.

h3 should be the same font-size and line-height as a paragraph, but boldface. 

It's the best way to add a headline to writing in wordland. Imho any other size starts getting into MySpace territory.