Saving Page as Template
A page must be published in order for it to be eligible to become a template.
In order to template a web or landing page Studio, simply open the page's editor, and then click the template icon found in the top right.
Once you have clicked the template icon the a drawer will open and you'll be prompted to provide a name for the template you're creating. Once you enter a name, click Save this page as template a copy of the page will be saved as a template.
How do I find the templates library?
Within the site page or landing page index, click the grey Templates button to launch the library then click My Custom Templates to view all the templates that have been saved in your account.