Adding regions to a theme requires two things that's are given below :-

  • Adding region meta-data to your THEMENAME.info.yml file.
  • Please edit your page.html.twig file then print new regions.

Default Regions

  • page.header
  • page.primary_menu
  • page.secondary_menu
  • page.highlighted
  • page.help (It has dynamic help text for admin pages)
  • page.content (main content of current page)
  • page.sidebar_first
  • page.sidebar_second
  • page.footer
  • page.breadcrumb
BY Best Interview Question ON 15 Apr 2020