Image forming apparatus

An image forming apparatus comprising:

• a forming operating unit which performs image forming based on image data;
• a data obtaining unit which obtains the image data as a target of the image forming;
• a storage which stores the image data;
• an instruction obtaining unit which obtains an operation instruction to instruct the forming operating unit to perform the image forming;
• an authentication receiver which receives a predetermined authentication operation regarding approval of reception of the operation instruction;
• and
• a hardware processor which performs the image forming based on the image data by controlling the forming operating unit when a limit setting regarding a limit of reception of the operation instruction is set on the image data as the target of the image forming according to the obtained operation instruction and it is determined that the authentication receiver received the authentication operation,
• wherein,
• the instruction obtaining unit obtains a setting changing instruction to change the limit setting;
• and
• the hardware processor changes the limit setting based on the obtained setting changing instruction.