Processing device, non-transitory recording medium storing a computer readable program and substitute process setting method

A substitute process setting method, comprising:

• obtaining information for displaying an operation window of a second processing device by a first processing device comprising an operation panel having a display and an operation receiver, a communicator that communicates with the second processing device via a network and a hardware processor that executes a designated process, the second processing device being connected with the first processing device via the network, and;
• displaying an operation window of the first processing device and the operation window of the second processing window on the operation panel of the first processing device so as to arrange the operation window of the first processing device and the operation window of the second processing device;
• and
• carrying a substitute setting for instructing the second processing device to substitutionally execute a process relating to an operation button moved to the operation window of the first processing device when an operation for moving the operation button displayed in the operation window of the second processing device to the operation window of the first processing device is received in a situation in which the operation window of the first processing device and the operation window of the second processing device are arranged and displayed on the operation panel of the first processing device.