To access the Aero Template Library, navigate to Library > Library Templates.
Users in their Free Trial Period - Only paid Aero subscribers can use Library Templates. If you are still in your free trial period you will need to add your payment information and end your free trial period.While in your free trial period you can see the Template Library, you just can't use any of the templates:
Regular Aero Subscribers - All paid Aero subscribers can use at least some Library Templates. Subscribers who have not upgraded to premium content will be able to see all of the templates that are available, but will only be able to use some of the templates:
Premium Content Aero Subscribers - Aero subscribers who upgrade to Premium content will be able to see and use ALL templates in the Template Library: