Board Thread:New Features/@comment-26040294-20180525190345/@comment-1038387-20181007153508

Go to Leafy's link - Special:MyPage/global.css.

Edit the page.

Add this: @import url("/load.php?mode=articles&articles=u:dev:MediaWiki:PseudoMonobook.css&only=styles");

Save. Then wait a bit for the update to kick in.