LIVESDY A common problem is ambiguous state indication: for example does the label "on" indicate the current state of the switch or the resulting state after interacting with it. Communicating affordance can also be difficult: for example should the user tap or slide the switch to change its state. A toggle switch is a graphical control element that allows the user to make a choice between two mutually exclusive states (such as on/off). Originally toggle switches were used primary in touchscreen-based user interfaces, but they have later become commonplace in desktop and web applications. Plaisant, Catherine; Wallace, Daniel (November 1990). Touchscreen toggle switches: push or slide? Design issues and usability study (PDF) (Report).|When it Comes to Hard Data