A method of controlling a projector includes performing tiling projection in a first area and a second area by a first projector and a first projector group projecting image light beams in the first area and the second projector group projecting image light beams in the second area, performing first adjustment processing of applying a second adjustment amount smaller than a first adjustment amount to the first projector group and projecting the image light beams when projection by the first projector stops and first processing is selected, and performing second adjustment processing of applying a third adjustment amount no larger than a difference between the first adjustment amount and the second adjustment amount to the first projector group after the first adjustment processing, and projecting the image light beams.