To prevent results of a plurality of jobs from being improperly piled together in one paper ejection port while avoiding waiting for execution of a job and to improve the convenience to a user, with respect to a printer having a plurality of paper ejection ports.

A control method of an information processor selects virtual paper ejection ports assigned to virtual paper ejection ports of N stages and selects device paper ejection ports for output and, in response to input of a print job to which output to a virtual paper ejection port is indicated, determines a device paper ejection port for output by making the virtual paper ejection port and the device paper ejection port correspond to each other. When the most suitable paper ejection port is determined on the printer side, the determined paper ejection port is reported to a client who has issued the print job. Furthermore, since there are no paper ejection ports allowing paper ejection because print results have been already ejected to paper ejection ports, clients of the print results piled in the paper ejection ports are informed to prompt them to remove the print results.