Hi judykator,
Currently the only way to make a task into a subtask is to drag and drop it.

I'm not sure if you're looking for a different way to do that or something else? Let me know if that's not what you meant and I can offer some more specifics.

I would prefer to do it via the keyboard. Or button at least that would create the task above current task.

Thanks for clarifying; I see what you mean now.

We don't currently offer this but we appreciate the feedback!

it would be good to add a command in the menu where is "delecte task" and "duplicate task", mayby "add larger task"