Board Thread:Support Requests - Getting Technical/@comment-27481084-20170620011748/@comment-168424-20170620220859

Definitely not just through CSS. It might be possible with Javascript, but it would slow things down.

As far as I can tell, the contents of sections are not enclosed in tags by default, so you'd need to figure out where a section ends and enclose the section in a div and use CSS to move the hide link to the right of the section header. Also, what would you do with subsections? It sounds like you haven't thought the implications through.