Drupal allows us to easily manage roles, and depending on how those roles are set up, we may want to change which role is considered the Administrator. For example, when we use the Standard install profile, Drupal creates an Administrator role and assigns that role accordingly.

If, for some reason, we want to assign a different role as administrator, we can select from a list of roles using the drop-down list located under the Administrator role section:

Based on our selection, this role will automatically be assigned proper permissions when a new module is enabled or a content type has been created.

Keep in mind that if we use the Minimal install profile this section may not have a role selected, and it may require both a role to be created and then for that role to be assigned as the default Administrator.