A method of enabling user interaction with computer software including, in a computer system, transferring print data to a printer, printing a form responsive to the print data 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 relative to the text field, using the indicating data to determine the movement and then perform an action associated with the text field based on the movement. The coded data is indicative of an identity and, in the computer system, the identity is determined using the indicating data, a page description is determined using the identity, and the text field is identified using the page description.