1. A projector, comprising: a display part configured to display a first image by projection; a retrieval object specifying part configured to cause a user of the projector to specify an object of retrieval; a result display area specifying part configured to cause the user to specify an area for displaying a result of the retrieval in the displayed first image; and an image combining part configured to receive a second image of the result of the retrieval from a server that has performed the retrieval with respect to the object of retrieval specified by the user, and to display the second image by combining the second image with the area for displaying the result of the retrieval in the displayed first image.