By Characteristics: (from User Interface Design & Evaluation, p. 213-214) – There is a visible and continuous representation of the task objects and
their actions. Consequently, there is little syntax to remember. – The task objects are manipulated by physical actions, such as clicking or
dragging, rather than by entering complex syntax. – Operations are rapid and incremental – Their effects on task objects are immediately visible. – Reversibility of (almost) all actions – Users can explore without severe consequences – Syntactic correctness – every operation is legal
• What (is/is not) direct manipulation in modern
interfaces?