AN IMAGE FORMING APPARATUS HAVING A MODE IN WHICH AN ORDER OF A PLURALITY OF READ IMAGES TO BE PRINTED CAN BE CHANGED

An image forming apparatus comprises function for reading images of a series of original documents in a first order and for outputting a series of image data items, storage function for storing the series of image data items outputted from the read function, instruct function for instructing one of the first order and a second order reverse to the first order, as an output order in which the series of image data items are outputted, first output function for outputting the series of image data items stored in the storage function, in the first order, in accordance with the output order instructed by the instruct function, second output function for converting the series of image data items stored in the storage function into the second order and for outputting the series of image data items converted, and function for forming images corresponding to the series of image data items outputted from the first or second output function.