Image forming apparatus and image forming method

An image forming apparatus comprising:

• a receiving processing portion configured to receive an operation for designating a designation page to which a predetermined printing condition is to be applied, of a document including a plurality of pages;
• a first printing processing portion configured to print a partial document including the designation page, of the document;
• a second printing processing portion configured to print a remaining document obtained by excluding the partial document from the document, in accordance with a predetermined confirmation operation after the printing by the first printing processing portion;
• a plurality of sheet placement portions on which sheets are placed;
• and
• a sheet conveying portion configured to convey the sheets from the plurality of sheet placement portions to a discharge portion, wherein
• the first printing processing portion and the second printing processing portion print the pages of the document on a single surface or both surfaces of each of the sheets conveyed by the sheet conveying portion from the sheet placement portion that is selected in advance, and
• the printing condition includes any one or more of:
• a first printing condition that is to cause the sheet conveying portion to discharge the sheets from the sheet placement portion different from the selected sheet placement portion to the discharge portion at a timing between printing of the designation page and printing of a previous page of the designation page;
• a second printing condition that is to print the designation page on the sheet conveyed from the sheet placement portion different from the selected sheet placement portion;
• and
• a third printing condition that is to, when a printing position, for the designation page, on the sheet conveyed by the sheet conveying portion is set to a back surface of the sheet, change setting of the printing position for the designation page to a front surface of the sheet to be conveyed next by the sheet conveying portion.