| **src** | _<empty>_ | The URL to the OpenAPI specification file. This can be relative to the URL of your page if it is a leaf or branch bundle. |
{{% notice note %}}
If you want to print out (or generate a PDF) from your OpenAPI documentation, don't initiate printing directly from the page because the elements are optimized for interactive usage in a browser.
Instead, open the [print preview](basics/customization#activate-print-support) in your browser and initiate printing from that page. This page is optimized for reading and expands most of the available sections.