Non-transitory computer-readable medium storing computer-readable instructions

A non-transitory computer-readable medium storing computer-readable instructions to control a portable terminal including a memory, an input interface, and a communication interface, the memory storing an operating system and an application program different from the operating system,

• the computer-readable instructions causing the portable terminal to perform determining whether the computer-readable instructions is activated by the operating system of the portable terminal due to an operation through the input interface or activated by the application program stored in the memory,
• the computer-readable instructions, when it is determined that the computer-readable instructions is activated by the operating system of the portable terminal due to the operation through the input interface, causing the portable terminal to perform:
• a first acceptance process of accepting an operation, through the input interface, designating one of image forming devices communicable through the communication interface;
• a first storage process of causing the memory to store a first device ID for identifying the image forming device designated by the first acceptance process, as a designated device ID;
• the computer-readable instructions, when it is determined that the computer-readable instructions is activated by the application program, causing the portable terminal to perform:
• an acquisition process of acquiring, from the application program, a second device ID for identifying the image forming device which is designated by a user caused by the application program;
• and
• a second storage process of causing the memory to store the second device ID acquired by the acquisition process, as the designated device ID,
• the computer-readable instructions, after performing one of the first storage process and the second storage process, causing the portable terminal to further perform:
• a second acceptance process of accepting an operation designating contents of an image forming operation through the input interface;
• and
• an operation instruction process of transmitting operation instruction information for causing the image forming operation having the contents designated by the second acceptance process to be performed to the image forming device identified by the designated device ID stored in the memory, through the communication interface.