Whether you want to build out your site with a page from a different template or you accidentally deleted one of the pages in your template and you'd like to add it back, adding a new page to site is super easy! To do so simply go to the site tab, click the + next to pages and select "Select New Page".
When adding a page from a different design you can decide whether or not to import the design settings from that page.
Apply My Fonts & Colors: This settings will apply all of the settings from the Design Settings panel to the page you are adding.
Use Original Design: This option will keep all of the design settings as they were on the original template.