Review Of Drupal Base Themes Ideas. So, using a base theme may require some coding and designing expertise, unlike the next type. So in other words all the new markup in html plus the old markup, css etc in d9+.
Think of it like drupal itself; Defining a theme with an.info.yml file define a drupal theme with an.info.yml file. A new subtheme of stable 9 can be generated in the /themes directory by running the following command:
