Display control method and display system

A display control method comprising:

• displaying, by at least one projector, a first user interface related to an adjustment of a projection image including a first display object corresponding to the projection image;
• displaying, by at least one controller communicating with the at least one projector, a second user interface including a second user interface display object corresponding to the projection image;
• transmitting, by the at least one projector, first adjustment information based on a first operation to the first user interface to the at least one controller when the at least one projector accepts the first operation;
• adjusting, by the at least one projector, the projection image based on the first adjustment information;
• updating, by the at least one controller, the first display object based on the first adjustment information;
• transmitting, by the at least one controller, second adjustment information based on a second operation to the second user interface to the at least one projector when the at least one controller accepts the second operation;
• adjusting, by the at least one projector, the projection image based on the second adjustment information;
• and
• updating, by the at least one projector, the first user interface based on the second adjustment information, wherein
• the adjustment of the projection image is a lens shift adjustment,
• the first user interface represents a positional relationship between the projection image and an area in which it is possible to move the projection image with the lens shift adjustment, and
• the first user interface includes a second display object representing a positional relationship between the area and the projection image, with the second display object superimposed on the first display object.