Patent ID: 7355733

Claim:
A digital image production apparatus comprising: a print engine; a plurality of trays each of which is capable of accommodating different types of recording sheets; a user interface; and an electronic control system for controlling print processing, including control of supply of recording sheets from the trays in accordance with sheet specifications of print jobs, wherein the control system has access to a memory which stores for each tray the type of recording sheets presently accommodated therein, and wherein, when recording sheets of a type required for a job are not available in any of the trays, the control system: indicates, through the user interface, the required type of recording sheet; selects an eligible tray that can accommodate the required recording sheets; invites, through the user interface, an operator to place recording sheets of the required type in the eligible tray; and automatically, in response to receiving a confirmation signal which confirms that the operator has completed the requested action, assumes that the installed recording sheets are of the required type and stores information specifying the required type of recording sheet in a location of the memory associated with said eligible tray.