In OneNote, a template is a page design that you can apply to new pages in your notebook to give them an appealing background, a more uniform appearance, or a consistent layout.
To apply a template, do the following:
On the ribbon, click Insert > Page Templates.
In the Templates task pane, click the small arrows next to the category names to expand them.
To apply a template to a new page, click its name in the list. If you don’t like your selection, click another template to replace your previous selection. You can do this repeatedly until you find a template to your liking.
When you’re finished, close the Templates task pane and then take notes on the new page whenever you’re ready.
OneNote comes with several built-in page templates that you can choose from, including decorative page backgrounds, planners, and To Do lists. If you’d like, you can also create your own page template or customize an existing one.
Note: Many template designs include content that appears in specific places on the page. For this reason, templates in OneNote can only be applied to new pages that don’t already contain any notes. If you want to apply a template to a page that already contains notes, first create a new page from the template you want, and then copy your existing notes over to it.