The user should be able to select the controller tracking speed (control-display ratio) from a predefined range; the default speed should be moderate.
Additional Information:
Control ratios and dynamic features should meet the dual requirement of rapid gross positioning and smooth, precise fine positioning. The control/display ratios should take into account both screen size and maximum maneuvering displacement. At a minimum, movement of the controller across the entire maneuvering surface should move the cursor from one side of the screen to the other.