Thank you for your feedback.
Unfortunately, editing existing lists or creating new lists is not currently possible.
We are working on bringing this functionality to the new Contacts pane as soon as possible. We appreciate your patience and your feedback as we work on making Contacts in Yahoo Mail a more streamlined and unified experience.
An error occurred while saving the commentSteven Jansen commented
Forcing this upgrade before the user contact portion is ridiculously poor customer service.. How are we supposed to use this product if it's not completely functional for distribution lists.. O.M.G!