Panorama Web Interface : Panorama > Templates : Template Stacks

Template Stacks
You can configure a template stack or assign templates to a template stack. Assigning firewalls to a template stack allows you to push all necessary settings to the firewalls instead of adding every setting to every template individually. Panorama supports up to 1,024 stacks. You can Add Stack to create a new template stack and configure the settings as described in the following table. After you configure a template stack, you must commit your changes in Panorama (see Panorama Commit Operations). Additionally, after you configure the network and device settings of firewalls assigned to the stack, you must perform a template commit and push the settings to the firewalls.
CAUTION: 
Deleting a template stack or removing a firewall from a template stack does not delete the values that Panorama previously pushed to that firewall; however, when you remove a firewall from a template stack, Panorama no longer pushes new updates to that firewall.
Add each template you want to include in the stack (up to 8).
CAUTION: 
If the list of firewalls is long, you can filter the list by Platforms, Device Groups, Tags, and HA Status.
Note: 
Add a Cloud Identity Engine instance to authenticate users using the authentication profile that you configure in the Cloud Identity Engine.
Add or Delete a pre-configured template. Move Up or Move Down templates to change priority. The template at the top has the highest priority.
Panorama > Templates