Interactive Book left-hand navigation menu
Hi, I'm very new to H5P and love it already! Thank you for creating this for the world. I work at UNICEF and am designing a short course using interactive book. I would like to be able to add drop-down sub categories similar to the H5P example (attached). How do I make it so that the main page has sub-pages underneath and drops down. Currently when I add content, it's not displaying on the left-hand navigation. Thank you so much for your assistance.