Let the User Maintain Control

People want to feel in control of an application. A well-designed, responsive user interface contributes much toward the user's perception of being in control. The following list gives design suggestions for achieving this:

• Enable the user to interrupt long operations.

• Discard meaningless user input during long operations. While waiting, users might randomly tap on the pen tablet or display. To dispose of spurious input in a discreet manner, enable your application to distinguish between meaningful and unintentional data.

• Allow the user to specify desired default settings.

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