A method for operating a portable large format inkjet printer includes determining an output image size of an output image to be printed on a stationary flat media; selecting a source image to serve as the output image; displaying a preview of the output image superposed with an output image grid defining a plurality of output image area portions; selecting a serial order of printing each of the output image area portions; selecting a next output image area portion based on the serial order; printing the selected next output image area portion at a media print area of the stationary flat media; and repeating the acts of selecting the next output image area portion and printing, for each of the plurality of output image area portions, until an entirety of the output image area has been printed at the media print area of the stationary flat media.