Subtasks
Subtasks are the steps of the same piece of work. Type them into the list in the detail panel and press Enter. The parent shows a counter like “3/7” — how much is done.
Dependencies
One task can block another: “B cannot start until A is finished.” The blocked task shows this in its detail panel, and a dependency map is built at project level.
A dependency does not change statuses automatically — it is a planning and warning aid, not an enforcement.