The Washington Post is testing a new feature that bakes relevant contextual information right into complex news stories. “The feature, which the Post calls a Knowledge Map, appears as highlighted links and buttons within the story, allowing readers to click on and then read a brief overview of relevant topics,” Nieman Lab reports. “The feature works on mobile, too: click on a highlighted link, and a window opens within the page that a reader can then exit out of without leaving the story page.”