@wally007 – it’s enabled in Aeon Nox 5 in the master build: GitHub - magnumdoomguy/skin.aeon.nox.5: Aeon Nox 5 Kodi skin modified to run on Plex if you want to look at the code there for implementing it in your modified default skin. Specifically you’ll find the code you need in includes_home.xml
As for what it is – if you’ve ever used Kodi, it’s highly similar to how Kodi works for the home menu. Instead of one submenu for the whole main menu, each section has its own submenu, with filters for things like actors and genres, which you can then browse: