| 摘要 |
A printing device (2) for printing an image on an image receiving medium comprises a controller for generating a control signal defining the value of at least one parameter for controlling the device which has at least one characteristic in accordance with which a desired value of the parameter is selected. A keyboard matrix comprising a plurality of key connectors arranged in rows and columns with keys (6) arranged at intersections of said rows and columns is provided. The keys (6) can be actuated by a user to input to the controller data for controlling the printing device. Intersections each have an activated state when the associated key (6) is actuated and an inactive state when the associated key (6) is not actuated. An addiitional connector is provided which defines a set of intersections with said rows or said columns of key connectors so that at least one of said set of intersections is maintained in an activated state. The controller is arranged to determine which of the set of intersections is in an activated state to define the desired value of the parameter. <IMAGE> |
