Primary and secondary navigation
Ghost have two navigation Settings. One is primary navigation and another is secondary navigation.
So in your site you can show two totally different navigation. In this DigiDocs theme Primary / Main navigation is visible in site header and the secondary navigation is visible in site footer.
So add all the important and frequently visited links in primary navigation. And all those less visited links like terms and conditions, privacy policy, Licence, subscribe links etc add in the secondary navigation.
Theme installation
At this area of of this page you can install / uninstall a theme or download already installed themes.