Image forming apparatus that displays a preview of a display image showing a state where an image is formed on a sheet of paper

An image forming apparatus, comprising:

• paper supply portions provided at a plurality of places for supplying a sheet of paper;
• an image output portion for forming and outputting an image based on image data which is input on a sheet of paper supplied from a first paper supply portion which is specified from among the plurality of paper supply portions;
• and
• an image display operation device, wherein
• the image display operation device includes
• a display image generating portion for generating a display image based on the image data before outputting the image to the sheet of paper supplied from the first paper supply portion,
• a display portion, and
• a display control portion for displaying the display image on the display portion,
• the display image generating portion includes
• a function for generating a first display image showing the first paper supply portion, and
• a function for generating a second display image showing a state where the image is formed on the sheet of paper supplied from the first paper supply portion when the image data is input as a preview image or a state where a sample image is formed on the sheet of paper before the image data is input as a confirmation image, and
• the display control portion includes
• a function for displaying a preview of the first display image on the display portion, and
• a function for displaying a preview of the second display image.