7.2.4-4 Feedback for Discrete-Adjustment Interface with Continuous Operation

If a discrete-adjustment interface has continuous operation, it should provide continuous feedback on the current state.

Additional Information:
A continuous-operation control continues to produce an effect until the user provides the next input, or until a predefined action sequence is stopped by a termination criterion. An example is a button that changes to the activated state when pressed and remains in that state until it is pressed again. An example of continuous feedback in a soft control is a checkbox format in which an 'X' appears in the box to indicate that an option has been selected, and disappears only after the option is de- selected.