Open the custom navigation settings panel to allow moving of links into or out of the navigation bar by dragging and dropping the links.
Add new custom links as desired.
JSON code can be copied from or pasted into this userscript settings panel to make it easy to transfer your custom navigation bar to and from other computers.
By default, only the icons are shown in the main navigation bar, but text can be included.
The search bar will shrink to a minimum of 200 pixels to allow as many links as possible in the main navigation bar. Beyond that, the right-side menu (notifications, new dropdown and avatar dropdown) will shift down.
GitHub specific pages (about, blog, business, explore, open-source, personal, and subdomains like help.github.com) use a different header navigation layout, and are not currently modified by this userscript.