Abstract: An example host device includes a user interface unit, a memory to store one or more instructions, and a processor. The processor controls to display a print option setting screen on a user interface unit, the print option setting screen including a second user interface area for setting a second print option function constrained according to a setting of a first print option function, and controls to display a first user interface element and a second user interface element in the second user interface area, the first print option function corresponding to an operation of displaying a first user interface area for setting a first user print option function and the second user interface element corresponding to an operation of changing the setting of the first print option function to a preset value.

Abstract: An example electronic device includes a communication unit, a user interface unit, a processor, and a memory to store instructions executable by the processor. The processor executes the instructions to store, in the memory, a plurality of programs capable of controlling operations performed in an image forming device, store, in the memory, a first user interface definition file corresponding to the plurality of programs in the memory, in a case where a first program among the plurality of programs is executed, call the first user interface definition file, and, based on first definition information for the first program included in the first user interface definition file, display a user interface of the first program through the user interface unit.

Abstract: An image forming device and an operating method of an image forming device are provided. The operating method includes receiving first authentication information corresponding to an account of a first user, when the account of the first user is authenticated according to the first authentication information, preparing an operation of the image forming device according to usage authorization of the first user; receiving a request to provide job information of the first user, obtaining a first job list of the first user from a ledger on which job information of a user with respect to a certain image forming job is recorded, based on a blockchain in which the ledger is distributed and managed, and performing a first image forming job selected from the first job list.

Abstract: An image forming device and an operating method of an image forming device are provided. The operating method includes receiving first authentication information corresponding to an account of a first user, when the account of the first user is authenticated according to the first authentication information, preparing an operation of the image forming device according to usage authorization of the first user; receiving a request to provide job information of the first user, obtaining a first job list of the first user from a ledger on which job information of a user with respect to a certain image forming job is recorded, based on a blockchain in which the ledger is distributed and managed, and performing a first image forming job selected from the first job list.