To create your own custom template, you will need a page that has all of the desired page items you wish to save and use again. Once you’re ready to save it, go to that page and then click on the Templates flyout in the second-level toolbar.
Click on the Save as Template button.
This will prompt you to choose a name for the template and which side of the two-page spread you wish to save as a template, if the book is open in two-page view. Once you have chosen the options you want, press OK.