-[Environment variables](environment_variables.md): Supported environment variables that can be used to override their defaults values in order to configure GitLab.
-[Plugins](plugins.md): With custom plugins, GitLab administrators can introduce custom integrations without modifying GitLab's source code.
-[Elasticsearch](../integration/elasticsearch.md): Enable Elasticsearch to empower GitLab's Advanced Global Search. Useful when you deal with a huge amount of data. **[STARTER ONLY]**
-[Enforcing Terms of Service](../user/admin_area/settings/terms.md)
-[Third party offers](../user/admin_area/settings/third_party_offers.md)
-[Compliance](compliance.md): A collection of features from across the application that you may configure to help ensure that your GitLab instance and DevOps workflow meet compliance standards.
-[Diff limits](../user/admin_area/diff_limits.md): Configure the diff rendering size limits of branch comparison pages.
-[Elasticsearch](../integration/elasticsearch.md): Enable Elasticsearch to empower GitLab's Advanced Global Search. Useful when you deal with a huge amount of data. **[STARTER ONLY]**