If you edit templates in the source code, you can use the filecabinet FreeMarker directive to reference files directly from the File Cabinet. By using this directive, you can embed text, images, and fonts that are stored in the File Cabinet into the template.
For example:
<@filecabinet nstype="image" src="https://<accountID>.app.netsuite.com/core/media/media.nl?id=21&c=4130331&h=fb3b8b4ac4f67b2c369b"/>
When you add an image to a template and check the File Cabinet Item box, the <@filecabinet/> directive is used in the source code.