1. From the Site Pages section on the left, create a page you want.
2. Specify the name in the Settings.
3. Hover your mouse over the Navigation bar and click on it. On the left panel with editing settings, remove the corresponding menu item which has been automatically created for the new page.
4. Now that the page has been excluded from the navigation, you can put the link to it from any part of your website. To do so, place a Button, an Image, or a Text phrase to the desired location and link the page to it.