To create custom types, you must belong to a role that has the Manage Asset Types permission. Besides allowing you to create custom types, this permission allows you to edit and delete any user-defined asset type. Additionally, it allows you to edit certain predefined types that are installed with CentraSite. By default, users in the CentraSiteAdministrator or Asset Type Administrator role have this permission, although an administrator can grant this permission to other roles.

For more information about roles and permissions, see Getting Started with CentraSite.