For a duplex print job a display portion of the image forming apparatus shows a stack image of one or more papers. A top paper in the image appears to have a corner turned over revealing a portion of the back side of the top paper, and revealing a portion of a front side of a second paper in the stack. Within the stack image, the image portion of the front side of the top paper shows a print preview of a front side of a first sheet in the duplex print job. Image portions corresponding to the back side of the top paper and the front side of the second paper show, respectively, print preview of the back side of the first sheet and front side of a second sheet. The page images may be displayed at a glance for multiple pages in a two up fashion.