ocr: Single Switching IS a mode of operation that allows a child that either can t, pr doesn't know how to control a mouse, to be able to use a computer program. By. pperating a single swit tch, i.e. the button on the mouse or some other simple switch connected to the computer, the child can select one of the available choices that the computer presents in turn. My thanks to John Smith of the BCSeMUG, for his suggestion to incorporate single switching into my program. During single switching, most of the menu choices are still available through Cmd-key equivalents. For nstructions on how to modify ...