According to one embodiment, a decoloring device includes a reading unit, a decoloring unit, and a control unit. The reading unit is configured to read control information from a first image formed in a predetermined area of a sheet. The decoloring unit is configured to decolor a portion or entirety of a second image, different from the first image, formed on the sheet using a decolorable recording material. The control unit is configured to control erasing of the data of the second image from a storage device, based on the control information, in a case where the decoloring unit decolors the second image.

A printing apparatus has: a paper tray having edge guides, each of which can guide one edge of paper in its width direction intersecting the transport direction of the paper; a paper width sensor that detects a paper width allowable in the paper tray according to the positions of the edge guides; a display controller that displays, on a display unit, a paper size selection screen on which candidate paper sizes corresponding to the paper width detected by the paper width sensor are displayed; and a selected size storage section that stores, in a storage section, paper selection information in which the paper width and the paper size selected on the paper size selection screen are related to each other.

An image forming apparatus which prevents a user from being confused when print data comprised of a plurality of sections is printed by the image forming apparatus. The image forming apparatus is able to perform test printing of print data for which a plurality of copies are to be printed. Whether or not a plurality of sections are included in selected print data is determined, and when it is determined that a plurality of sections are included in the selected print data, execution of the test printing is restricted.

A printing apparatus capable of conveying sheets to a sheet processing apparatus and to control the type of a sheet to be used as a cover sheet in a case where a book bound product is generated by switching back sheets each having an image printed, inverting the sheets and folding the inverted sheets, and to notify an error to a user based on the type of a sheet to be used as the cover sheet in a case where printing an image on the cover sheet is designated.

An image display unit capable of displaying image data page-wise includes: a scanner portion; a display panel for displaying input image data in preview representation; an input condition determiner that compares the image data successively input through the scanner portion, as to input condition and determines whether there is any change in the image data input condition; and a display controller that, when the input condition determiner determines that the input image data has changed in the input condition, makes control such as to display the image data that was determined to have changed in the input condition and the image data input immediately before the image data in question, together on the display panel.

An image forming apparatus includes an acquisition unit and a determination unit. The acquisition unit acquires a print setting about at least one of items including a size of a recording medium used for printing, a type of the recording medium, and a conveyance speed of the recording medium. The determination unit determines a printing method to be executed among a plurality of printing methods including a first printing method for drawing an image having a density and a second printing method for drawing an image having a density that is higher than the density of an image printed by the first printing method. Where the print setting is acquired by the acquisition unit, the determination unit determines whether to permit execution of printing by the second printing method based on the print setting acquired by the acquisition unit.

An image forming apparatus includes a document reader, a storage for storing image data, an image output unit and a control unit. The control unit includes: a function setup controller for setting up the image output conditions of output images; and a control-unit side controller having a function of displaying a function setup screen corresponding to the function setup controller, on a display panel. The function setup controller has an additional input mode having a function of reading documents a multiple number of times to form multiple sheaves of documents. The additional input mode includes: an individual setup function of setting up individual image output conditions for each sheaf of documents and an all-in setup function of setting up identical image output conditions for all sheaves of documents. When the additional input mode is set up, the control unit-side controller offers a display of a setup change suggestion of the image output conditions for the next input on the display screen at the stage where the first image data input has been completed.

An image forming apparatus includes an image forming unit, an input unit and a control unit. The image forming unit forms an image by using a plurality of consumables. The input unit receives an input of information designating the consumables to be used for forming the image. The control unit selectably displays other candidates of the consumables to be used for forming the image, based on the designated consumables.

An image forming apparatus includes: a document reading unit 110 allowing input of image data generated from a read document, a paper feed unit 140 containing recording paper, an image forming unit 120 forming an image on the recording paper based on the image data, and a touch-panel display 132 displaying a preview image representing a state of image formation. The touch-panel display displays a preview image in a designated orientation for a document of a prescribed size, and displays a preview image in accordance with size and orientation of recording paper fed from the paper feed unit, for a document not of the prescribed size. Thus, for documents of a prescribed size, preview images in a prescribed orientation can be displayed regardless of the direction of arrangement of the recording paper, and easier confirmation of expected finish of the formed image becomes possible.

An image forming apparatus includes an image forming unit, an input unit and a control unit. The image forming unit forms an image by using a plurality of consumables . The input unit receives an input of information designating the consumables to be used for forming the image. The control unit selectably displays other candidates of the consumables to be used for forming the image, based on the designated consumables.