Show category list. Push on category icon in apps drawer or drag from left to rigth like in the video (min 00:10)
Hide apps. To hide apps from “All apps” list, edit this list and unselect the apps. A new category appears named “Uncategorized”. Also you can hide this category.
Sort categories. To sort categories push and drag the category left icon (min 00:22)
Edit / remove own categories. Push on category right icon and select option