Windows 10 is designed to adapt its user interface based on the type of device being used and available input methods. It offers two separate user interface modes: a "tablet mode" optimized for use with touch screens, and one optimized for mouse and keyboard. A new feature called Continuum automatically offers the user the chance to switch between the two modes at appropriate times, for example, when a keyboard is attached to a tablet or a convertible laptop is switched to its tablet configuration.[20] A new iteration of the Start menu is used, with a list of applications and other options on the left side, and live tiles on the right. The menu can be resized, and expanded into a full-screen display, which is the default option in touch environments.