Notebooks for iPhone Answers

 To create a list you have two options:

• Create a new book and turn on the switch labeled “Show as Task List”
• Open a book’s info page and turn on the switch labeled “Show as Task List”

The behavior of the book remains very much unchanged, except that documents are displayed as tasks. You can still put any type of document onto the list.

Task lists are displayed with a modified book icon and show a badge with the number of open and due tasks. 

Just like books, task lists can be nested. This is a convenient way of breaking projects down into more manageable sub projects. At each level, a list’s badge counts the open tasks of all sub projects.

To change a task's state, tap on its icon

• in the task list without opening the task itself
• in the navigation bar when you have opened the task
• in the list of search results in the list of search results