A display system for displaying one image on a display surface by combining a first image displayed by a first display apparatus and a second image displayed by a second display apparatus, wherein: the first display apparatus displays a first index image at a position which is close to the image displayed by the second display apparatus and which is included in a display range of the first display apparatus, the first index image having a predetermined color and the image having luminances which are changed in a direction parallel to a side adjacent to the image displayed by the second display apparatus; and the first display apparatus corrects the image displayed by the first display apparatus on the basis of a designated position of the first index image.