A system for enabling user interaction with computer software which includes a computer system which transfers print data to a printer. The printer is responsive to the print data to print a form by printing information indicative of a text field coincident with coded data indicative of the text field, so that when a sensing device is moved relative to the text field the sensing device can sense the coded data and generate the indicating data indicative of its movement. The computer system uses the indicating data to determine the relative movement and then perform an action associated with the text field based on the movement. The computer system further determines the information, an identity indicative of the text field, and a layout defining an arrangement for coded data indicative of the identity and information, and generates the print data to be indicative of the identity, layout and information.

 
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