1. Right-click on the selected page and click "Save page as a template".
2. A preview of your page will be shown. Name the template with a description that will be recognizable, then save the template.
3. To insert a page template, click the usual "Add Page" button.
4. Navigate to the "Saved Templates" tab in the pop-up window.
5. This tab will show an overview of all your saved templates. Click on one and add it as a new page.