Larger tasks can be broken down into subtasks so you can work through a to-do step by step. Subtasks belong to a parent task and are tracked together with it.
Create a subtask
Open a task. In the task form you find the subtasks area. Click Create subtask, enter a title and store it with Save subtask. Repeat for each step.
Work through them
Each subtask can be marked as done like a normal task, so you see the progress of the overall task at a glance.