2.3.3-2 Responsive Cursor Control

The cursor control should permit both fast movement and accurate placement.

Additional Information:
Ideally, when the user moves a pointing device, the displayed cursor should appear to move instantly. Rough positioning should take no more than 0.5 seconds for full screen traversal. Fine positioning may require incremental stepping of the cursor, or a control device incorporating a large control/display ratio for small displacements, or a selectable vernier mode of control use. For any given cursor control action, the rate of cursor movement should be constant, i.e., should not change with time. Slow visual feedback of cursor movement can be particularly irritating when a user is repeatedly pressing a cursor control key, or perhaps holding the key down. In that case, slow feedback may cause the user to misjudge location and move the cursor too far.