Is there a easy way to assign estimates to a sub task?

[Antoinette]

With the previous version, it was quite easy to assign estimation.

The popup allowed you to input the Original Estimation when creating the subtask.

With the new version, you need to create the subtask, go into the subtask and then only will you be able to configure the estimations. 

My parent story is also not calculating the total subtasks estimations.

Please help?