Hi enygren,
You can drag a task and drop it on another task to make it a subtask. Hope that helps!

(This applies to some top-secret things over in the Remember The Milk Pro Tester Program—check it out if you want to know more!)

Hi andrewski,

to drag and drop a task helps. However, when the tasks are not on the same list (or view), then drag and drop is not possible.

E.g.:
I have a task in my inbox and I want to make it a subtask to some other task, which is not in my inbox. I can not directly make it a subtask then.

Do you have advice for this?

Hi mihage,
The only workaround is to get the tasks into the same view and then to drag the task over the other task. Thanks for your feedback!

Thanks. That is how I'm doing it.
If you want to have fun developing something new, you might just go for a possibility to directly assign a task as a subtask to a task in another list.

I would like that feature...

I've started a new feature post for this. For me, subtasking using drag and drop is really clunky. I'd like to be able to just "Make this a subtask of", or inversely, "Add an existing task as a subtask".

https://www.rememberthemilk.com/forums/ideas/20572/

Yes! Something similar to how one can currently re-assign tasks to another list. Granted... I can see how it would be tricky to implement.
Maybe after selecting the task to be moved and choosing "reassign as subtask", a search view could pop up for you to find the right target task?

+1. My use case: I often brain dump into Inbox, and then ideally I want to drop those tasks as subtasks in other Lists. But as is noted here, that's not super easy.

+1. Just as apgordon said, I might think of some tasks that should be part of project X so I'll quickly dump it to the Inbox, but there's no easy way to make it a subtask of the task in another list that represents my project. Tasks with subtasks represent a project to me. This is becoming a major stumbling block for me over Todoist.

One additional thought on this...Right now I can select the task and choose Move To... and it shows me a list of Lists. But I also have an edit box there. If I could just begin typing in the name of the task I want as parent and have that list dynamically update with matches as I type, I could very quickly zero in on my parent task to be. Then it's just a matter of me clicking the parent task in that updated list to quickly assign it as a subtask to that parent task.

+1, i also support this feature!

please allow me to move subtasks to tasks and tasks to subtasks
I really need this and cannot find a way to do it

+1 especially useful for people who are new to pro and want to consolidate old tasks.

Would also need to work on mobile.

+1 I agree with everyone that dragging and dropping is very clunky.

+1 In the same way that it is so easy to assign tasks to lists, tags etc. from the Inbox through keyboard shortcuts, I am how difficult it is to re-allocate tasks to become sub-tasks. I suspects that sub-tasks are under-used as a result

+1 for this request and the ability to also do this in mobile.

+1 for mobile. Most of the work I do with tasks is on iOS and I can’t do this, so it’s hard for me to process my inbox for projects or sub tasks when I have a lot of these types of items of a larger project.

+1 for this as well, especially with support for keyboard shortcuts. I live by those!

+10 me too, sub tasks managging by using keyboard shortcuts is a must!