Board Thread:Support Requests - Getting Technical/@comment-26840207-20150927042900/@comment-4731443-20150927051356

Collapsible help is here. Here's an example of what you could do from that template based on the customizations you mentioned:

data-expandtext and data-collapsetext control the expand and collapse links. Rounded corners are achieved with border-radius; you can change the radius. Background and border colors are controlled with the background and border properties.