Hiding pages
To hide a page so that it doesn't show up in your site's navigation, but is still there to link to from anywhere else, you just need to toggle the Display Content? toggle to 'No' on your Define screen for that page.
This can be useful for landing pages, or pages that you want to link to from within a page like we just did above. You could also use this to hide an old page, yet keep it available for people who may have linked to it or bookmarked it.