Abstract: An image forming apparatus stores a plurality of jobs. When a process for a job is temporarily stopped due to any trouble of the apparatus or interruption, the job is not automatically resumed if an image reader and a printer operate for the same job. If the image reader and the printer operate for different jobs, only the printing operation is automatically resumed. In this case, the reading operation of the image reader is not automatically resumed.

Abstract: In an image forming apparatus, first in a printing delay process, it is determined whether or not a specific mode is set. When it is determined that a specific mode is set, printing is inhibited until images to be printed are accumulated in a memory, and whether or not originals are mixed originals (of assorted sizes) is detected. If it is determined that originals are mixed ones, start of printing is inhibited. Since printing cannot be executed when a specific mode in which mixed originals cannot be handled is set, an image forming apparatus capable of automatically handling mixed originals can be provided.