Replacing tasks, conditions or branches
You can replace existing tasks either by dropping a new task on it, or by pasting another task over it.
To replace an existing task with a new task, see Adding tasks.
To replace an existing task with another existing task or its properties, see Cutting, copying and pasting tasks and branches.
Note: You cannot replace a task by a branch or a condition. Trying to paste or drop a branch or condition over a task will insert it before the task instead. The contrary is also true, you cannot replace a branch or condition with a task.
Caution: When you replace a task, you lose all the properties you set in this task.