FIG. 13 is a flowchart illustrating the details of processing operation executed in step S12. Portions in FIG. 13 corresponding to those in FIG. 4 are denoted by the corresponding reference numerals. Symbol S in the drawing denotes “step”. FIG. 13 is different from FIG. 4 only in that the undetermined-speed list is used in place of the print list.

Therefore, the processor 31 sets the rasterizing speed for the print job at the top of the undetermined-speed list to a provisional lowest rasterizing speed (step S71A).

Next, the processor 31 determines whether or not there are any remaining print jobs in the undetermined-speed list (step S72A).

The other processes are the same as those in FIG. 4. That is, in the case where a negative result is obtained in step 72A, the processor 31 executes step S75. In the case where a positive result is obtained in step 73, meanwhile, the processor 31 executes step S74.

Changes in display that accompany the execution of the processing operation illustrated in FIGS. 12 and 13 will be described below.

FIG. 14 illustrates a specific example of six print jobs handled by the processor 31 (see FIG. 1). The six print jobs are given job names “print job #11” to “print job #16”.