The best way to design and modify your Drupal site is with overrides.

If you're not sure how overrides work, read our introduction to Drupal overrides.

One of the most powerful ways to use overrides Drupal is with sub-themes. You might not be surprised to know we have an introduction to sub-themes too!

However, sometimes you need not just sub-themes, but you also sub-sub-themes. Sounds crazy? Well, sub-sub-themes are what you need to safely override some themes you download from Drupal.org.

Read on to find out about sub-sub-themes: