A control system for an image processing apparatus that uses an information processing device. The image processing apparatus includes an authentication processor that authenticates users with reference to user information that associates, for multiple users, information regarding the user with starting screen information used to start operating the image processing apparatus and a screen information transmitter that transfers screen information to the information processing device independent of the image processing apparatus. The screen information is used to display the starting screen on the image processing apparatus based on the starting screen information associated with the user authenticated by the authentication processor. The information processing device includes a screen information management unit that receives the screen information and a screen display processor that displays the starling screen on a display unit of the information processing device based on the received screen information.