There is an option to detach subtasks from the parent task to create a separate task. Can we have the option to do the opposite—to add an existing task as a subtask of another task ('attach' a task).
My company uses Gmail and we have an add-in to create a task from an email. Once created we can then move the task into a project or folder. But often I want to make the task a subtask of an existing task. This currently can't be done.