1. Head to the 'Listing Template' menu.

2. Select the "My Custom Templates" option from the navigation menu on the side.

3. In the bottom left corner of each template, there is an option to add a star sign to indicate that the template should be added to the agent's collections. By marking a template with a star, it is included in the agent's preferred collection for future use.

4. Once selected, your custom template will be added to the Auto Collection, and all your listings assets will automatically be prepared using this template.