You installed a basic Drupal 8 website, created a few articles and now you want to customize the way the content pages look. When you go to “Manage Display” you can re-order fields but you can’t put them in regions.
Display Suite is the module designed to do just that. It offers extra regions on the “Manage Display” page with a drag-and-drop fields interface. There are different layouts with different sets of regions. You can move fields around without writing a single line of code.