@sebj A few places! Gwern uses a fleuron as a previous/next control (https://gwern.net/design#similars-section). Many sites use end marks (aka tombstones) as well. Slate Magazine uses a little right angle at the end of their articles. This is a great blog post for that: https://rwt.io/typography-tips/marks-ends-and-middles-end-marks-sections-and-dead-ends