Navigating the site

The top navigation is the fastest way around the site. From left to right you'll find the logo (home), a Topics menu that opens a tag cloud, the main sections, search, and your account menu.

• Topics — hover the menu next to the logo to jump to any subject area.
• Search — open it from the navbar to filter courses, lessons and docs as you type.
• Dark mode — toggle the sun/moon icon; your choice is remembered on this device.
• Account — sign in to see your avatar, saved progress and the Become an Author link.

Tip: On mobile, the menu collapses behind the hamburger icon; lesson pages show a left-hand drawer for the curriculum.