Each category folder has a green button on its flap that you can use to add lists to that folder. Tap the button, name your list, and a blank list will be created in that folder. If you want to rearrange your lists, tap the “Edit” button on the main screen. The controls on the right can be used to move lists both within and between folders. While editing, you can delete lists by tapping the red minus sign and confirming. You can also rename your lists by tapping on the name, which will bring up the keyboard and allow you to change the name.