Patent ID: 8508784

Claim:
An image forming system, comprising: an information terminal device configured to edit image formation data with application software; an image forming device configured to form an image on a recording medium based on the image formation data edited by the information terminal device, wherein the image forming device is further configured to be operated using a driver different from the application software; and a first detecting unit configured to detect size information of the recording medium, wherein, upon execution of computer readable instructions, the information terminal device is configured to function as: a registration unit configured to register the size information, detected by the first detecting unit, as setting information; an adding unit configured to add the setting information as selectable setting items in the application software; a selecting unit configured to receive an input for selecting desired setting information from the selectable setting items; a displaying unit configured to display an edit screen including an editable area for allowing a user to edit the image formation data when executing the application software; and a reflecting unit configured to visually change a size of the editable area in the edit screen displayed by the displaying unit based on the selected setting information in the application software so as to conform to the size information.