A control device includes a processor and a memory coupled to or integrated with the processor and controls an information processing apparatus, in which the processor is configured to simultaneously display, in an operation screen, a selection list of tasks for selecting a task to be executed by the information processing apparatus and a slide button as an execution button for instructing execution of the selected task, and once an operation of instructing execution of the task by the slide button is detected, performs control to change the slide button to a cancel button for canceling the task that is being executed.

An information processing apparatus which communicates with an image forming apparatus that forms an image on a sheet, the information processing apparatus includes: an acquisition unit configured to acquire error information about an error that has occurred in the image forming apparatus, and maintenance information about maintenance work performed on the image forming apparatus; a memory configured to store a plurality of pieces of error information acquired by the acquisition unit; and a controller. The controller is configured to: determine, from the plurality of pieces of error information stored in the memory, based on the maintenance information, first error information about an error that has occurred during the maintenance work; and determine an error part of the image forming apparatus based on second error information obtained by excluding the first error information from the plurality of pieces of error information stored in the memory.

An image forming apparatus includes: a detection unit configured to detect an amount of developer stored in a developing container and to output remaining amount information; and a control unit configured to perform control, during a replenishment of the developer to the developing container using a replenishment container, to cause a display unit to display a message related to the replenishment. When the replenishment is instructed, the control unit is further configured to perform a first control during the replenishment in a case where the remaining amount information indicates a first remaining amount, and configured to perform a second control different from the first control during the replenishment in a case where the remaining amount information indicates a second remaining amount greater than the first remaining amount.

An example user terminal apparatus includes a display, a communication apparatus to communicate with an external apparatus, and a processor to, based on information on a possible first toner refill quantity of a plurality of grouped image forming apparatuses provided from the external apparatus through the communication apparatus and a toner quantity of one toner refill apparatus, control the display to display a guide message including information on the time point of toner refill, each of the image forming apparatuses which is a subject of toner refill within the group, and a possible second toner refill quantity of each of the image forming apparatuses at the time point of toner refill.

A printing apparatus includes a scanner, a printer, a storage, a controller, and a display. The scanner reads a plurality of originals. The printer starts to print images of the originals read by the scanner before the reading of the plurality of originals is completed. The controller selects, from a plurality of printing paper holding units of the printing apparatus, a printing paper holding unit storing printing paper sheets on which the images are to be formed. The display displays an error message in a case where the number of the printing paper sheets held in the selected printing paper holding unit is less than a number of the printing paper sheets necessary to complete the printing of the images of the plurality of read originals.

Provided are an image forming apparatus for outputting a plurality of images having different sizes according to a method pre-set by a user without interrupting a current printing operation when the plurality of images having different sizes are obtained and a method of operating the image forming apparatus.

First correction data for use in a first printing mode is generated by image density measurement in the first printing mode, and second correction data for use in a second printing mode, which is different from the first printing mode in peripheral speed ratio of a developing roller to a photosensitive drum, is generated by image density measurement in the second printing mode. First processing for generating first and second correction data for the first and second printing modes, respectively, by density measurement, or second processing for generating the first correction data by density measurement and generating the second correction data using the generated first correction data and a difference in image density between the first printing mode and the second printing mode is executed. The first processing is executed when a predetermined condition is satisfied.

An image display operation device includes a function selecting portion to correlate with a plurality of functions so as to be executable, a display portion to display the function selecting portion, and a display control portion that causes the display portion to display the function selecting portion. The function selecting portion includes a first function selecting portion in which selectable function items are displayed, and a second function selecting portion in which other function items that are selectable in conjunction with functions included in the first function selecting portion are displayed. When one or more functions included in the first function selecting portion are selected, the display control portion changes function items to be displayed on the second function selecting portion, based on contents of the one or more functions selected on the first function selecting portion.

An image forming method and apparatus, includes setting a processing order of a plurality of operations of a same image data and detailed setup information of the plurality of operations, and executing the plurality of operations using the detailed setup information according to the set processing order.

An image forming apparatus having a printer for printing an image on a sheet fed from an external sheet feeding apparatus sets the sheet feeding apparatus as a sheet feed source of the sheet to be used by the printer for printing and in accordance with the setting, makes a notification so as to notify a user to set a feeding parameter in the sheet feeding apparatus.