Features
Dependency chains
Where: iPhone → Settings → Workflow → Dependency chains. Mac → Settings → Workflow → Dependency chains.
On (the default), a blocked task sits indented under the task that blocks it, with a little elbow, so a chain of dependent work reads as one thread instead of three unrelated lines. Off, every task sits at the same level and blocked tasks are marked only by their hand icon.
The setting is per account and syncs, and is part of Pro — on Free it reads off. It changes layout only — never which tasks a filter includes; for that, a filter can hide dependency chains.