How do I make one task a subtask of another on the iPad? Both tasks already exist, and I can do a search that puts them on the same screen. On the web version it would be drag and drop. What is it here?
It is not currently possible to move tasks into subtasks on the iPhone. You will need to do that on the website, or delete the task and recreate it inside the parent task on the iPhone. The app only supports creating new subtasks. This is something that we plan to improve upon in the future.