Board Thread:Support Requests - Getting Technical/@comment-35649802-20180601203515/@comment-1038387-20180601204842

As visible in their CSS:

/* Infobox template style */ .infobox { border: 1px solid #aaaaaa; background-color: #f9f9f9; color: black; margin-bottom: 0.5em; margin-left: 1em; padding: 0.2em; float: right; clear: right; } .infobox td, .infobox th { vertical-align: top; } .infobox caption { font-size: larger; margin-left: inherit; } .infobox.bordered { border-collapse: collapse; } .infobox.bordered td, .infobox.bordered th { border: 1px solid #aaaaaa; } .infobox.bordered .borderless td, .infobox.bordered .borderless th { border: 0; }

What you're looking for is the border.