Hello Yahoo Mail team,
I would like to request an option to hide or collapse the right‑hand panel that contains “Starred”, “Contacts”, and “More”. In the new interface this panel takes up valuable horizontal space and cannot be removed, which makes the layout feel cramped on many screens.

Please consider adding a toggle to disable or collapse this panel, similar to how the left navigation panel can be collapsed. This would greatly improve usability and customization for many users.

Thank you for considering this improvement.