Initially the user selects one of two squares. Then the level of difficulty gradually increases to select a picture from multiple rows and columns. Catch the Cow provides a large on-screen button for selection as shown. An option is provided to use it with an external switch that is compatible with the Apple Bluetooth Wireless Keyboard. The space, enter, ~, 1, 2, 3 or 4 key equivalents can be used to select. Compatible Buetooth controllers and switches are available from RJ Cooper & Asoociates Inc. and Ablenet Inc.
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