1. A projector comprising: a projection section adapted to project an image on a projection surface; a focus adjustment section adapted to perform a focus adjustment of the projection section in accordance with an operation; a shooting section adapted to shoot the projection surface; an evaluation value calculation section adapted to calculate an evaluation value used to evaluate contrast of a shot image of the shooting section; and a control section adapted to make the projection section project an image, which corresponds to a difference between the evaluation value calculated by the evaluation value calculation section after the focus adjustment and a maximum value of the evaluation values having been calculated by the evaluation value calculation section before the focus adjustment, on the projection surface in a case in which the focus adjustment section has performed the focus adjustment in accordance with the operation.