> For the complete documentation index, see [llms.txt](https://docs.toomuchmedia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.toomuchmedia.com/nats-admin/skins-and-templates/further-reading/template-function-parameters/tpl.md).

# tpl

The tpl parameter to many [NATS](/additional-resources/common-terms.md#nats) functions lets you change which template the function uses to display its output. 

For example, the NATS template function, [nats\_display\_adtools](/nats-admin/skins-and-templates/further-reading/template-functions/nats_display_adtools.md), normally displays its output using the *function\_display\_adtools* template. 

In the [Skins & Templates Admin](/nats-admin/skins-and-templates.md), you can duplicate this template, edit the duplicate to change its format slightly, and then use the duplicate with the following code: (Note: the duplicated template is named function\_display\_adtools2.)

```
{nats_display_adtools tpl="function_display_adtools2"}
```