As a developer, you can use an Oracle Content Management Toolkit CLI command to create an enterprise template from a standard site.

By default, the create-template command creates a standard template if the site is a standard site and an enterprise template if the site is an enterprise site. You can create an enterprise template from a standard site as well.

Run cec create-template with the new -enterprise option:

cec create-template EnterpriseTemp1 -s StandardSite1 -e