There are two ways to turn RepeatKeys on and off:
Check the RepeatKeys check box in the AccessX main window.
Hold down the Shift key (either one) for eight seconds.
The computer beeps at four seconds to let you know that you're turning this feature on or off. (Valid only if you've started OpenWindows with the -accessx option.)
Holding down the Shift key for eight seconds also turns on SlowKeys.