1. Hover your newly created template design.
2. Click ‘create child’ link.
4. A number of child template will display at the bottom area of the parent template.
5. Click ‘show children’ button to display your newly created child template.
6. Click ‘edit’ button to redesign the child template.
For instructions on how to edit a template please visit this link Create a New Template. Please refer to steps #13 onwards