1. An image forming apparatus, comprising: a print unit configured to print an image on a sheet; a reading unit configured to read a sheet; a first print control unit configured to allow the print unit to print a sheet for handwriting; an extraction unit configured to extract a handwritten image corresponding to handwriting contents included in a read image obtained by reading a handwritten sheet; an input unit configured to input an instruction to designate a decor for determining decoration contents to the handwritten image and a painting pattern of a decorated area; and a second print control unit configured to allow the print unit to print an image where a handwritten image, which is decorated according to the decoration contents determined according to an input to the input unit and the painting pattern designated by an input to the input unit, is combined with a background image, wherein the decoration contents are determined according to the designated contents for the decor based on the input to the input unit and the painting pattern designated by the input to the input unit.